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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 >> USN56-1 : exim4 vulnerabilities Vulnerability Assessment Details
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USN56-1 : exim4 vulnerabilities |
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exim4 vulnerabilities Detailed Explanation for this Vulnerability Assessment Summary : These remote packages are missing security patches : - exim4 - exim4-base - exim4-config - exim4-daemon-heavy - exim4-daemon-light - eximon4 Description : A flaw has been found in the host_aton() function, which can overflow a buffer if it is presented with an illegal IPv6 address that has more than 8 components. When supplying certain command line parameters, the input was not checked, so that a local attacker could possibly exploit the buffer overflow to run arbitrary code with the rights of the Exim mail server. (CVE-2005-0021) Additionally, the BASE64 decoder in the SPA authentication handler did not check the size of its output buffer. By sending an invalid BASE64 authentication string, a remote attacker could overflow the buffer, which could possibly be exploited to run arbitrary code with the rights of the Exim mail server. (CVE-2005-0022) Solution : Upgrade to : - exim4-4.34-5ubuntu1.1 (Ubuntu 4.10) - exim4-base-4.34-5ubuntu1.1 (Ubuntu 4.10) - exim4-config-4.34-5ubuntu1.1 (Ubuntu 4.10) - exim4-daemon-heavy-4.34-5ubuntu1.1 (Ubuntu 4.10) - exim4-daemon-light-4.34-5ubuntu1.1 (Ubuntu 4.10) - eximon4-4.34-5ubuntu1.1 (Ubuntu 4.10) 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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