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CVE-2013-4314

UnknownEPSS 1.20%

Last modified

CVE-2013-4314 is a vulnerability of currently unknown severity. 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 estimates a 1.20% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
1.20%

64.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
Jean-Paul CalderonePyopenssl<= 0.13—
Jean-Paul CalderonePyopenssl0.7—
Jean-Paul CalderonePyopenssl0.8A1
Jean-Paul CalderonePyopenssl0.9—
Jean-Paul CalderonePyopenssl0.10—
Jean-Paul CalderonePyopenssl0.11—
Jean-Paul CalderonePyopenssl0.12—
CanonicalUbuntu Linux10.04—
CanonicalUbuntu Linux12.04—
CanonicalUbuntu Linux12.10—
CanonicalUbuntu Linux13.04—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2013-4314?
Severity scoring for CVE-2013-4314 is pending analysis. The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.
How do I fix CVE-2013-4314?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-4314?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST