Vulnerability Monitor

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CVE-2013-4314

The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\0' character in a domain name in the 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.

Published

2013-09-30T21:55:09.583

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 4.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application jean-paul_calderone pyopenssl ≤ 0.13 Yes
Application jean-paul_calderone pyopenssl 0.7 Yes
Application jean-paul_calderone pyopenssl 0.8 Yes
Application jean-paul_calderone pyopenssl 0.9 Yes
Application jean-paul_calderone pyopenssl 0.10 Yes
Application jean-paul_calderone pyopenssl 0.11 Yes
Application jean-paul_calderone pyopenssl 0.11 Yes
Application jean-paul_calderone pyopenssl 0.11 Yes
Application jean-paul_calderone pyopenssl 0.12 Yes
Operating System canonical ubuntu_linux 10.04 Yes
Operating System canonical ubuntu_linux 12.04 Yes
Operating System canonical ubuntu_linux 12.10 Yes
Operating System canonical ubuntu_linux 13.04 Yes
References