CVE-2009-3942

MEDIUM 6.4CVE-2009-3942 · Published 16/11/2009 · updated 16/06/2026

In short

CVE-2009-3942 is a MEDIUM (CVSS 6.4) vulnerability affecting msmtp (martin lambers).
Chance of exploitation in the next 30 days (EPSS): 1.1%, higher than 65.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
msmtp martin_lambers	`= 0.2.5= 0.2.6= 0.3.0= 0.3.1= 0.4.0= 0.4.1= 0.4.2= 0.5.0= 0.5.1= 0.5.2= 0.5.3= 0.6.0= 0.6.1= 0.6.2= 0.6.3= 0.6.4= 0.6.5= 0.6.6= 0.7.0= 0.7.1= 0.7.2= 1.0.0= 1.2.1= 1.2.2= 1.2.3= 1.2.4= 1.4.0= 1.4.1= 1.4.10= 1.4.12= 1.4.13= 1.4.14= 1.4.15= 1.4.16= 1.4.17= 1.4.2= 1.4.3= 1.4.4= 1.4.5= 1.4.6= 1.4.7= 1.4.8= 1.4.9≤ 1.4.18`	No fix yet

Description

Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name 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.

References

lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.html
msmtp.sourceforge.net/news.html
secunia.com/advisories/37321 · Vendor Advisory
vupen.com/english/advisories/2009/3224 · Vendor Advisory

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