CVE-2013-4314
No CVSS score yet. EPSS 1.2% chance of exploitation in the next 30 days. Fixed in pyopenssl 0.13.1.
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.
- EPSS
- 1.2% chance of exploitation in the next 30 days; higher than 68% of CVEs (scores of 2026-10-31)
- CWE
- CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Affected
- canonical:ubuntu_linux
- jean-paul_calderone:pyopenssl
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-6748-36qp-fx6r | PyPI | pyopenssl | <0.13.1 | 0.13.1 |
| PYSEC-2013-31 | PyPI | pyopenssl | <0.13.1 | 0.13.1 |