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11:22
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Packet Storm Security Recent Files
SSLsplit is a tool for man-in-the-middle attacks against SSL/TLS encrypted network connections. Connections are transparently intercepted through a network address translation engine and redirected to SSLsplit. SSLsplit terminates SSL/TLS and initiates a new SSL/TLS connection to the original destination address, while logging all data transmitted. SSLsplit is intended to be useful for network forensics and penetration testing.
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11:22
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Packet Storm Security Misc. Files
SSLsplit is a tool for man-in-the-middle attacks against SSL/TLS encrypted network connections. Connections are transparently intercepted through a network address translation engine and redirected to SSLsplit. SSLsplit terminates SSL/TLS and initiates a new SSL/TLS connection to the original destination address, while logging all data transmitted. SSLsplit is intended to be useful for network forensics and penetration testing.
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21:38
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SecDocs
Authors:
Jesse Burns Peter Eckersley Tags:
X.509 SSL Event:
Chaos Communication Congress 27th (27C3) 2010 Abstract: The EFF SSL Observatory has collected a dataset of all TLS/HTTPS certificates visible on the public web. We discuss this dataset - what we have learned from it, how you can use it, and how intend to offer a live, continually updated version of it. TLS/SSL is only as good as your mechanism for verifying the other party, and it turns out that with HTTPS and other CA-certified applications of TLS, that mechanism involves trusting a lot of governments, companies and individuals. The SSL observatory is a project to bring more transparency to SSL Certificate Authorities, and help understand who really controls the web's cryptographic authentication infrastructure. The Observatory is an Electronic Frontier Foundation (EFF) project that began by surveying port 443 of all public IPv4 space. At Defcon 2010, we reported the initial findings of the SSL Observatory. That included thousands of valid 'localhost' certificates, certificates with weak keys, CA certs sharing keys and with suspicious expiration dates, and the fact that there are approximately 650 organisations that can sign a certificate for any domain that will be trusted by modern desktop browsers, including some that you might regard as untrustworthy. In this talk we will give an update on new developments in the project, including where to find a copy of our data and how to work with it for your own research; the progress made at fixing some of the vulnerabilities we found; and our design for a new, decentralised version of the SSL Observatory.
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21:38
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SecDocs
Authors:
Jesse Burns Peter Eckersley Tags:
X.509 SSL Event:
Chaos Communication Congress 27th (27C3) 2010 Abstract: The EFF SSL Observatory has collected a dataset of all TLS/HTTPS certificates visible on the public web. We discuss this dataset - what we have learned from it, how you can use it, and how intend to offer a live, continually updated version of it. TLS/SSL is only as good as your mechanism for verifying the other party, and it turns out that with HTTPS and other CA-certified applications of TLS, that mechanism involves trusting a lot of governments, companies and individuals. The SSL observatory is a project to bring more transparency to SSL Certificate Authorities, and help understand who really controls the web's cryptographic authentication infrastructure. The Observatory is an Electronic Frontier Foundation (EFF) project that began by surveying port 443 of all public IPv4 space. At Defcon 2010, we reported the initial findings of the SSL Observatory. That included thousands of valid 'localhost' certificates, certificates with weak keys, CA certs sharing keys and with suspicious expiration dates, and the fact that there are approximately 650 organisations that can sign a certificate for any domain that will be trusted by modern desktop browsers, including some that you might regard as untrustworthy. In this talk we will give an update on new developments in the project, including where to find a copy of our data and how to work with it for your own research; the progress made at fixing some of the vulnerabilities we found; and our design for a new, decentralised version of the SSL Observatory.
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21:51
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SecDocs
Authors:
Jesse Burns Peter Eckersley Tags:
X.509 SSL Event:
Chaos Communication Congress 27th (27C3) 2010 Abstract: The EFF SSL Observatory has collected a dataset of all TLS/HTTPS certificates visible on the public web. We discuss this dataset - what we have learned from it, how you can use it, and how intend to offer a live, continually updated version of it. TLS/SSL is only as good as your mechanism for verifying the other party, and it turns out that with HTTPS and other CA-certified applications of TLS, that mechanism involves trusting a lot of governments, companies and individuals. The SSL observatory is a project to bring more transparency to SSL Certificate Authorities, and help understand who really controls the web's cryptographic authentication infrastructure. The Observatory is an Electronic Frontier Foundation (EFF) project that began by surveying port 443 of all public IPv4 space. At Defcon 2010, we reported the initial findings of the SSL Observatory. That included thousands of valid 'localhost' certificates, certificates with weak keys, CA certs sharing keys and with suspicious expiration dates, and the fact that there are approximately 650 organisations that can sign a certificate for any domain that will be trusted by modern desktop browsers, including some that you might regard as untrustworthy. In this talk we will give an update on new developments in the project, including where to find a copy of our data and how to work with it for your own research; the progress made at fixing some of the vulnerabilities we found; and our design for a new, decentralised version of the SSL Observatory.
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18:31
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Packet Storm Security Advisories
Ubuntu Security Notice 1418-1 - Alban Crequy discovered that the GnuTLS library incorrectly checked array bounds when copying TLS session data. A remote attacker could crash a client application, leading to a denial of service, as the client application prepared for TLS session resumption. Matthew Hall discovered that the GnuTLS library incorrectly handled TLS records. A remote attacker could crash client and server applications, leading to a denial of service, by sending a crafted TLS record. Various other issues were also addressed.
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18:31
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Packet Storm Security Recent Files
Ubuntu Security Notice 1418-1 - Alban Crequy discovered that the GnuTLS library incorrectly checked array bounds when copying TLS session data. A remote attacker could crash a client application, leading to a denial of service, as the client application prepared for TLS session resumption. Matthew Hall discovered that the GnuTLS library incorrectly handled TLS records. A remote attacker could crash client and server applications, leading to a denial of service, by sending a crafted TLS record. Various other issues were also addressed.
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18:31
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Packet Storm Security Misc. Files
Ubuntu Security Notice 1418-1 - Alban Crequy discovered that the GnuTLS library incorrectly checked array bounds when copying TLS session data. A remote attacker could crash a client application, leading to a denial of service, as the client application prepared for TLS session resumption. Matthew Hall discovered that the GnuTLS library incorrectly handled TLS records. A remote attacker could crash client and server applications, leading to a denial of service, by sending a crafted TLS record. Various other issues were also addressed.
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19:06
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Packet Storm Security Advisories
Red Hat Security Advisory 2012-0429-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer. A boundary error was found in the gnutls_session_get_data() function. A malicious TLS/SSL server could use this flaw to crash a TLS/SSL client or, possibly, execute arbitrary code as the client, if the client passed a fixed-sized buffer to gnutls_session_get_data() before checking the real size of the session data provided by the server.
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19:06
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Packet Storm Security Recent Files
Red Hat Security Advisory 2012-0429-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer. A boundary error was found in the gnutls_session_get_data() function. A malicious TLS/SSL server could use this flaw to crash a TLS/SSL client or, possibly, execute arbitrary code as the client, if the client passed a fixed-sized buffer to gnutls_session_get_data() before checking the real size of the session data provided by the server.
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19:06
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Packet Storm Security Misc. Files
Red Hat Security Advisory 2012-0429-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer. A boundary error was found in the gnutls_session_get_data() function. A malicious TLS/SSL server could use this flaw to crash a TLS/SSL client or, possibly, execute arbitrary code as the client, if the client passed a fixed-sized buffer to gnutls_session_get_data() before checking the real size of the session data provided by the server.
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19:05
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Packet Storm Security Advisories
Red Hat Security Advisory 2012-0428-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding. A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer.
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19:05
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Packet Storm Security Recent Files
Red Hat Security Advisory 2012-0428-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding. A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer.
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19:05
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Packet Storm Security Misc. Files
Red Hat Security Advisory 2012-0428-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding. A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer.
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7:22
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Packet Storm Security Recent Files
This report gives general recommendations as to how to configure SSL/TLS in order to provide state of the art authentication and encryption. The options offered by SSL engines grew from the early days since Netscape developed SSL2.0. The introduction of TLS made matters more challenging as servers and clients offer different sets of available options depending on which SSL engine (OpenSSL, NSS, SCHANNEL, etc.) they use. Finding the middle ground has proven difficult especially as the supported protocols and cipher suites are mostly not documented. To make matters more complicated Browsers may not use all functionality offered by the SSL stack, this report will only list functionality used by current Browsers. This report provides an overview of the currently available TLS options across Servers and Clients and allows you to offer support for a wide variety of Browsers an offer "good enough" security.
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7:22
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Packet Storm Security Misc. Files
This report gives general recommendations as to how to configure SSL/TLS in order to provide state of the art authentication and encryption. The options offered by SSL engines grew from the early days since Netscape developed SSL2.0. The introduction of TLS made matters more challenging as servers and clients offer different sets of available options depending on which SSL engine (OpenSSL, NSS, SCHANNEL, etc.) they use. Finding the middle ground has proven difficult especially as the supported protocols and cipher suites are mostly not documented. To make matters more complicated Browsers may not use all functionality offered by the SSL stack, this report will only list functionality used by current Browsers. This report provides an overview of the currently available TLS options across Servers and Clients and allows you to offer support for a wide variety of Browsers an offer "good enough" security.
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6:53
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Packet Storm Security Advisories
Asterisk Project Security Advisory - The Asterisk TCP/TLS server suffers from a denial of service vulnerability. Versions 1.6.1.x, 1.6.2.x, and 1.8.x are all affected.
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6:53
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Packet Storm Security Recent Files
Asterisk Project Security Advisory - The Asterisk TCP/TLS server suffers from a denial of service vulnerability. Versions 1.6.1.x, 1.6.2.x, and 1.8.x are all affected.
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6:53
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Packet Storm Security Misc. Files
Asterisk Project Security Advisory - The Asterisk TCP/TLS server suffers from a denial of service vulnerability. Versions 1.6.1.x, 1.6.2.x, and 1.8.x are all affected.
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16:30
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Packet Storm Security Advisories
A flaw has been found in the OpenSSL TLS server extension code parsing which on affected servers can be exploited in a buffer overrun attack. All versions of OpenSSL supporting TLS extensions contain this vulnerability including OpenSSL 0.9.8f through 0.9.8o, 1.0.0, 1.0.0a releases. Any OpenSSL based TLS server is vulnerable if it is multi-threaded and uses OpenSSL's internal caching mechanism. Servers that are multi-process and/or disable internal session caching are NOT affected. In particular the Apache HTTP server (which never uses OpenSSL internal caching) and Stunnel (which includes its own workaround) are NOT affected.
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16:30
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Packet Storm Security Recent Files
A flaw has been found in the OpenSSL TLS server extension code parsing which on affected servers can be exploited in a buffer overrun attack. All versions of OpenSSL supporting TLS extensions contain this vulnerability including OpenSSL 0.9.8f through 0.9.8o, 1.0.0, 1.0.0a releases. Any OpenSSL based TLS server is vulnerable if it is multi-threaded and uses OpenSSL's internal caching mechanism. Servers that are multi-process and/or disable internal session caching are NOT affected. In particular the Apache HTTP server (which never uses OpenSSL internal caching) and Stunnel (which includes its own workaround) are NOT affected.
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16:30
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Packet Storm Security Misc. Files
A flaw has been found in the OpenSSL TLS server extension code parsing which on affected servers can be exploited in a buffer overrun attack. All versions of OpenSSL supporting TLS extensions contain this vulnerability including OpenSSL 0.9.8f through 0.9.8o, 1.0.0, 1.0.0a releases. Any OpenSSL based TLS server is vulnerable if it is multi-threaded and uses OpenSSL's internal caching mechanism. Servers that are multi-process and/or disable internal session caching are NOT affected. In particular the Apache HTTP server (which never uses OpenSSL internal caching) and Stunnel (which includes its own workaround) are NOT affected.
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18:00
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Packet Storm Security Advisories
Ubuntu Security Notice 990-1 - Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds backported support for the new RFC5746 renegotiation extension and will use it when both the client and the server support it.
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18:00
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Packet Storm Security Advisories
Ubuntu Security Notice 990-2 - USN-860-1 introduced a partial workaround to Apache that disabled client initiated TLS renegotiation in order to mitigate CVE-2009-3555. USN-990-1 introduced the new RFC5746 renegotiation extension in openssl, and completely resolves the issue. After updating openssl, an Apache server will allow both patched and unpatched web browsers to connect, but unpatched browsers will not be able to renegotiate. This update introduces the new SSLInsecureRenegotiation directive for Apache that may be used to re-enable insecure renegotiations with unpatched web browsers. Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds backported support for the new RFC5746 renegotiation extension and will use it when both the client and the server support it.
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13:36
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Packet Storm Security Recent Files
Ubuntu Security Notice 927-8 - USN-927-1 fixed vulnerabilities in NSS. This update provides the Thunderbird update to use the new NSS. Original advisory details: Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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13:34
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Packet Storm Security Advisories
Ubuntu Security Notice 927-8 - USN-927-1 fixed vulnerabilities in NSS. This update provides the Thunderbird update to use the new NSS. Original advisory details: Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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12:03
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Packet Storm Security Recent Files
Ubuntu Security Notice 927-6 - USN-927-1 fixed vulnerabilities in NSS on Ubuntu 9.10. This update provides the corresponding updates for Ubuntu 9.04. Original advisory details: Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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12:03
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Packet Storm Security Recent Files
Ubuntu Security Notice 927-7 - USN-927-4 fixed vulnerabilities in NSS. This update provides the NSPR needed to use the new NSS. Original advisory details: Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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12:03
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Packet Storm Security Advisories
Ubuntu Security Notice 927-6 - USN-927-1 fixed vulnerabilities in NSS on Ubuntu 9.10. This update provides the corresponding updates for Ubuntu 9.04. Original advisory details: Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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12:03
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Packet Storm Security Advisories
Ubuntu Security Notice 927-7 - USN-927-4 fixed vulnerabilities in NSS. This update provides the NSPR needed to use the new NSS. Original advisory details: Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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21:05
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Packet Storm Security Recent Files
Ubuntu Security Notice 927-4 - USN-927-1 fixed vulnerabilities in nss in Ubuntu 9.10. This update provides the corresponding updates for Ubuntu 8.04 LTS. Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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21:05
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Packet Storm Security Recent Files
Ubuntu Security Notice 927-5 - USN-927-4 fixed vulnerabilities in NSS. This update provides the NSPR needed to use the new NSS. Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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21:02
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Packet Storm Security Advisories
Ubuntu Security Notice 927-4 - USN-927-1 fixed vulnerabilities in nss in Ubuntu 9.10. This update provides the corresponding updates for Ubuntu 8.04 LTS. Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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21:02
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Packet Storm Security Advisories
Ubuntu Security Notice 927-5 - USN-927-4 fixed vulnerabilities in NSS. This update provides the NSPR needed to use the new NSS. Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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17:00
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Packet Storm Security Recent Files
Mandriva Linux Security Advisory 2010-089 - The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a plaintext injection attack, aka the Project Mogul issue. The gnutls_x509_crt_get_serial function in the GnuTLS library before 1.2.1, when running on big-endian, 64-bit platforms, calls the asn1_read_value with a pointer to the wrong data type and the wrong length value, which allows remote attackers to bypass the certificate revocation list (CRL) check and cause a stack-based buffer overflow via a crafted X.509 certificate, related to extraction of a serial number. The updated packages have been patched to correct these issues.
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17:00
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Packet Storm Security Advisories
Mandriva Linux Security Advisory 2010-089 - The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a plaintext injection attack, aka the Project Mogul issue. The gnutls_x509_crt_get_serial function in the GnuTLS library before 1.2.1, when running on big-endian, 64-bit platforms, calls the asn1_read_value with a pointer to the wrong data type and the wrong length value, which allows remote attackers to bypass the certificate revocation list (CRL) check and cause a stack-based buffer overflow via a crafted X.509 certificate, related to extraction of a serial number. The updated packages have been patched to correct these issues.
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18:00
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Packet Storm Security Advisories
Ubuntu Security Notice 927-3 - USN-927-1 fixed vulnerabilities in NSS. Due to upstream changes in NSS 3.12.6, Thunderbird would be unable to initialize the security component and connect with SSL/TLS if the old libnss3-0d transition package was installed. This update fixes the problem. Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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22:00
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Packet Storm Security Recent Files
Ubuntu Security Notice 927-1 - Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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22:00
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Packet Storm Security Advisories
Ubuntu Security Notice 927-1 - Marsh Ray and Steve Dispensa discovered a flaw in the TLS and SSLv3 protocols. If an attacker could perform a man in the middle attack at the start of a TLS connection, the attacker could inject arbitrary content at the beginning of the user's session. This update adds support for the new new renegotiation extension and will use it when the server supports it.
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19:01
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Packet Storm Security Tools
Harden SSL/TLS hardens the default SSL/TLS settings of Windows 2000,2003,2008,2008R2, XP,Vista,7. It allows you to remotely set SSL/TLS policies allowing or denying certain ciphers/hashes or complete ciphersuites.
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19:01
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Packet Storm Security Recent Files
Harden SSL/TLS hardens the default SSL/TLS settings of Windows 2000,2003,2008,2008R2, XP,Vista,7. It allows you to remotely set SSL/TLS policies allowing or denying certain ciphers/hashes or complete ciphersuites.