CVE-2009-3941

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-11-16 · updated 2026-06-16
Weakness: CWE-310

Description

Martin Lambers mpop before 1.0.19, 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.

Affected products

Martin Lambers Mpop: through 1.0.18; 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.2.0 (+35)

References

http://mpop.sourceforge.net/news.html
http://secunia.com/advisories/37312
http://www.vupen.com/english/advisories/2009/3225
http://mpop.sourceforge.net/news.html
http://secunia.com/advisories/37312
http://www.vupen.com/english/advisories/2009/3225

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