CVE-2009-5138

Name: CVE-2009-5138
Creator: NVD / NIST
Published: 2014-03-07T00:10:53.323+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.80%

Last modified Jun 16, 2026

CVE-2009-5138 is a vulnerability of currently unknown severity. GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, treats version 1 X.509 certificates as intermediate CAs, which allows remote attackers to bypass intended restrictions by leveraging a X.509 V1 certificate from a trusted CA to issue new certificates, a different vulnerability than CVE-2014-1959.. EPSS estimates a 1.80% chance of exploitation in the next 30 days.

Description

GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, treats version 1 X.509 certificates as intermediate CAs, which allows remote attackers to bypass intended restrictions by leveraging a X.509 V1 certificate from a trusted CA to issue new certificates, a different vulnerability than CVE-2014-1959.

Metrics

EPSS Probability

1.80%

75.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-264

Affected Software

Vendor	Product	Versions
Gnu	Gnutls	<= 2.7.5
Gnu	Gnutls	2.7.0
Gnu	Gnutls	2.7.1
Gnu	Gnutls	2.7.2
Gnu	Gnutls	2.7.3
Gnu	Gnutls	2.7.4

References

Timeline

Published: Mar 7, 2014
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-5138?

How severe is CVE-2009-5138?

Severity scoring for CVE-2009-5138 is pending analysis. The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.

How do I fix CVE-2009-5138?

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-2009-5138?

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

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Source: NVD / NIST