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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 >> Ubuntu Local Security Checks >> USN204-1 : openssl vulnerability Vulnerability Assessment Details
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USN204-1 : openssl vulnerability |
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openssl vulnerability Detailed Explanation for this Vulnerability Assessment Summary : These remote packages are missing security patches : - libssl-dev - libssl0.9.7 - openssl Description : Yutaka Oiwa discovered a possible cryptographic weakness in OpenSSL applications. Applications using the OpenSSL library can use the SSL_OP_MSIE_SSLV2_RSA_PADDING option (or SSL_OP_ALL, which implies the former) to maintain compatibility with third party products, which is achieved by working around known bugs in them. The SSL_OP_MSIE_SSLV2_RSA_PADDING option disabled a verification step in the SSL 2.0 server supposed to prevent active protocol-version rollback attacks. With this verification step disabled, a possible hacker acting as a "man in the middle" could force a client and a server to negotiate the SSL 2.0 protocol even if these parties both supported SSL 3.0 or TLS 1.0. The SSL 2.0 protocol is known to have severe cryptographic weaknesses and is supported as a fallback only. Solution : Upgrade to : - libssl-dev-0.9.7g-1ubuntu1.1 (Ubuntu 5.10) - libssl0.9.7-0.9.7g-1ubuntu1.1 (Ubuntu 5.10) - openssl-0.9.7g-1ubuntu1.1 (Ubuntu 5.10) Network Security Threat Level: High Networks Security ID: Vulnerability Assessment Copyright: Ubuntu Security Notice (C) 2005 Canonical, Inc. / NASL script (C) 2005 Michel Arboi |
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