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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 >> Gentoo Local Security Checks >> [GLSA-200501-23] Exim: Two buffer overflows Vulnerability Assessment Details
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[GLSA-200501-23] Exim: Two buffer overflows |
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Exim: Two buffer overflows Detailed Explanation for this Vulnerability Assessment The remote host is affected by the vulnerability described in GLSA-200501-23 (Exim: Two buffer overflows) Buffer overflows have been found in the host_aton() function (CVE-2005-0021) as well as in the spa_base64_to_bits() function (CVE-2005-0022), which is part of the SPA authentication code. Impact A local attacker could trigger the buffer overflow in host_aton() by supplying an illegal IPv6 address with more than 8 components, using a command line option. The second vulnerability could be remotely exploited during SPA authentication, if it is enabled on the server. Both buffer overflows can potentially lead to the execution of arbitrary code. Workaround There is no known workaround at this time. References: http://www.exim.org/mail-archives/exim-announce/2005/msg00000.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0021 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0022 Solution: All Exim users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.43-r2" Network Security Threat Level: High Networks Security ID: Vulnerability Assessment Copyright: (C) 2005 Michel Arboi |
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