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CVE-2009-3942

6.4 · MEDIUM

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.5…

Published Nov 16, 2009martin_lambersCWE-310EPSS 1.08%

Overview

CVE-2009-3942 is a medium-severity vulnerability affecting martin_lambers msmtp. It was published on November 16, 2009 and has a CVSS 2.0 base score of 6.4 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from martin_lambers. Update msmtp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
martin_lambersmsmtp0Affected

References

Reflists.opensuse.org/opensuse-security-announce/2010-01/msg00007.htmlRefmsmtp.sourceforge.net/news.htmlRefsecunia.com/advisories/37321Refwww.vupen.com/english/advisories/2009/3224Reflists.opensuse.org/opensuse-security-announce/2010-01/msg00007.htmlRefmsmtp.sourceforge.net/news.htmlRefsecunia.com/advisories/37321Refwww.vupen.com/english/advisories/2009/3224

How CyberStrike helps

Frequently asked questions

What is CVE-2009-3942?

CVE-2009-3942 is a medium-severity vulnerability affecting martin_lambers msmtp. It was published on November 16, 2009 and has a CVSS 2.0 base score of 6.4 (MEDIUM).

How severe is CVE-2009-3942?

This vulnerability has a CVSS 2.0 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-3942?

Check the references section for vendor advisories and patches from martin_lambers. Update msmtp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-3942?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-3942 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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