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Vulnerability Assessment & Network Security Forums |
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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> Debian Local Security Checks >> [DSA1195] DSA-1195-1 openssl096 Vulnerability Assessment Details
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[DSA1195] DSA-1195-1 openssl096 |
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DSA-1195-1 openssl096 Detailed Explanation for this Vulnerability Assessment Multiple vulnerabilities have been discovered in the OpenSSL cryptographic software package that could permit a possible hacker to launch a denial of service attack by exhausting system resources or crashing processes on a victim's computer. Tavis Ormandy and Will Drewry of the Google Security Team discovered a buffer overflow in SSL_get_shared_ciphers utility function, used by some applications such as exim and mysql. An attacker could send a list of ciphers that would overrun a buffer. Tavis Ormandy and Will Drewry of the Google Security Team discovered a possible DoS in the sslv2 client code. Where a client application uses OpenSSL to make a SSLv2 connection to a malicious server that server could cause the client to crash. Dr S N Henson of the OpenSSL core team and Open Network Security recently developed an ASN1 test suite for NISCC (www.niscc.gov.uk). When the test suite was run against OpenSSL a DoS was discovered. Certain types of public key can take disproportionate amounts of time to process. This could be used by a possible hacker in a denial of service attack. For the stable distribution (sarge) these problems have been fixed in version 0.9.6m-1sarge4. This package exists only for compatibility with older software, and is not present in the unstable or testing branches of Debian. We recommend that you upgrade your openssl096 package. Note that services linking against the openssl shared libraries will need to be restarted. Common examples of such services include most Mail Transport Agents, SSH servers, and web servers. Solution : http://www.debian.org/security/2006/dsa-1195 Network Security Threat Level: High Networks Security ID: Vulnerability Assessment Copyright: This script is (C) 2006 Michel Arboi |
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