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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-200606-19] Sendmail: Denial of Service Vulnerability Assessment Details
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[GLSA-200606-19] Sendmail: Denial of Service |
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Sendmail: Denial of Service Detailed Explanation for this Vulnerability Assessment The remote host is affected by the vulnerability described in GLSA-200606-19 (Sendmail: Denial of Service) Frank Sheiness discovered that the mime8to7() function can recurse endlessly during the decoding of multipart MIME messages until the stack of the process is filled and the process crashes. Impact By sending specially crafted multipart MIME messages, a remote attacker can cause a subprocess forked by Sendmail to crash. If Sendmail is not set to use a randomized queue processing, the attack will effectively halt the delivery of queued mails as well as the malformed one, incoming mail delivered interactively is not affected. Additionally, on systems where core dumps with an individual naming scheme (like "core.pid") are enabled, a filesystem may fill up with core dumps. Core dumps are disabled by default in Gentoo. Workaround The Sendmail 8.13.7 release information offers some workarounds, please see the Reference below. Note that the issue has actually been fixed in the 8.13.6-r1 ebuild. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1173 http://www.sendmail.org/releases/8.13.7.html Solution: All Sendmail users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/sendmail-8.13.6-r1" Network Security Threat Level: Medium Networks Security ID: Vulnerability Assessment Copyright: (C) 2006 Michel Arboi |
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