The match_component function in smtp-tls.c in libESMTP 1.0.3.r1, and possibly other versions including 1.0.4, treats two strings as equal if one is a substring of the other, which allows remote attackers to spoof trusted certificates via a crafted subjectAltName.

libesmtp did not properly handle wildcards and embedded null characters in the Common Name of X.509 certificates (CVE-2010-1192 / CVE-2010-1194). This has been fixed.

Multiple vulnerabilities has been found and corrected in libesmtp :

libESMTP, probably 1.0.4 and earlier, does not properly handle a \'\0\' (NUL) character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408 (CVE-2010-1192).

The match_component function in smtp-tls.c in libESMTP 1.0.3.r1, and possibly other versions including 1.0.4, treats two strings as equal if one is a substring of the other, which allows remote attackers to spoof trusted certificates via a crafted subjectAltName (CVE-2010-1194).

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The updated packages have been patched to correct these issues.

libesmtp did not properly handle wildcards and embedded null characters in the Common Name of X.509 certificates (CVE-2010-1192, CVE-2010-1194).

ID	Name	Product	Family	Severity
50929	SuSE 11 Security Update : libesmtp (SAT Patch Number 2390)	Nessus	SuSE Local Security Checks	medium
49742	Mandriva Linux Security Advisory : libesmtp (MDVSA-2010:195)	Nessus	Mandriva Local Security Checks	medium
46251	openSUSE Security Update : libesmtp (openSUSE-SU-2010:0220-1)	Nessus	SuSE Local Security Checks	medium
46250	openSUSE Security Update : libesmtp (openSUSE-SU-2010:0220-1)	Nessus	SuSE Local Security Checks	medium
46249	openSUSE Security Update : libesmtp (openSUSE-SU-2010:0220-1)	Nessus	SuSE Local Security Checks	medium

Detections

Analytics

CVE-2010-1194

high

Tenable Plugins

medium

medium

medium

medium

medium