pyca/pyopenssl · Security
PyOpenSSL Mishandles NUL Byte In Certificate Subject Alternative Name
- GHSA ID
- GHSA-6748-36qp-fx6r
- CVE ID
- CVE-2013-4314
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS v4
- 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
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.
CWEs
- CWE-20 · Improper Input Validation
References
- https://nvd.nist.gov/vuln/detail/CVE-2013-4314 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=1005325 ↗
- https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html ↗
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html ↗
- http://www.debian.org/security/2013/dsa-2763 ↗
- http://www.openwall.com/lists/oss-security/2013/09/06/2 ↗
- http://www.ubuntu.com/usn/USN-1965-1 ↗
- https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2 ↗
- https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml ↗
- https://github.com/advisories/GHSA-6748-36qp-fx6r ↗