PT-2013-4953 · Openssl · Pyopenssl

Christian Heimes · Published 2013-09-13 · Updated 2024-07-12 · CVE-2013-4314

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions pyOpenSSL versions prior to 0.13.1

Description The issue arises from the improper handling of a 0 character in a domain name within the Subject Alternative Name field of an X.509 certificate by the X509Extension in pyOpenSSL. This allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

Recommendations For pyOpenSSL versions prior to 0.13.1, update to version 0.13.1 or later to resolve the issue. As a temporary workaround, consider restricting the acceptance of certificates with domain names containing the 0 character in the Subject Alternative Name field.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2013-4314

DSA-2763-1

GHSA-6748-36QP-FX6R

MGASA-2013-0277

OPENSUSE-SU-2024:10214-1

OPENSUSE-SU-2024:11253-1

OPENSUSE-SU-2024:14154-1

PYSEC-2013-31

SUSE-FU-2022:0444-1

SUSE-FU-2022:0445-1

Affected Products

Pyopenssl

References · 20

• http://ubuntu.com/usn/USN-1965-1 · Vendor Advisory
• http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html · Vendor Advisory
• http://debian.org/security/2013/dsa-2763 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:14154-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2013-4314 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2013-0277.html · Security Note
• https://osv.dev/vulnerability/PYSEC-2013-31 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2013-4314 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2013-4314 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-6748-36qp-fx6r · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2013-4314 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2013-0277 · Vendor Advisory
• https://github.com/pyca/pyopenssl · Note
• https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2 · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml · Note