CVEvulnerability
CVE-2013-4314
4.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2013-09-30
- Last modified
- 2026-06-16
- Assigner
- [email protected]
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-20
Description
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.
Affected configurations
• jean-paul calderone pyopenssl (<= 0.13)
• jean-paul calderone pyopenssl 0.7
• jean-paul calderone pyopenssl 0.8
• jean-paul calderone pyopenssl 0.9
• jean-paul calderone pyopenssl 0.10
• jean-paul calderone pyopenssl 0.11
• jean-paul calderone pyopenssl 0.12
• canonical ubuntu linux 10.04
• canonical ubuntu linux 12.04
• canonical ubuntu linux 12.10
• canonical ubuntu linux 13.04
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html lists.opensuse.org
- http://www.debian.org/security/2013/dsa-2763 www.debian.org
- http://www.openwall.com/lists/oss-security/2013/09/06/2 www.openwall.com
- http://www.ubuntu.com/usn/USN-1965-1 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1005325 bugzilla.redhat.com
- https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html mail.python.org
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html lists.opensuse.org
- http://www.debian.org/security/2013/dsa-2763 www.debian.org
- http://www.openwall.com/lists/oss-security/2013/09/06/2 www.openwall.com
- http://www.ubuntu.com/usn/USN-1965-1 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1005325 bugzilla.redhat.com
- https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html mail.python.org