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CVE-2009-3942

MEDIUM · CVSS 6.4EPSS 1.1%EU EUVD

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.

Key facts

CVSS score
6.4 (v2.0)
Severity
MEDIUM
CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:P
Weakness (CWE)
CWE-310
EPSS score
1.1% (65th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2009-3913)
Published
November 16, 2009
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-3913 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

  • martin lambers / msmtp
  • martin lambers / msmtp
  • martin lambers / msmtp
  • martin lambers / msmtp
  • martin lambers / msmtp
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  • martin lambers / msmtp
  • martin lambers / msmtp
  • martin lambers / msmtp
  • martin lambers / msmtp

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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