CVE-2009-5138 Security feature bypass in n/a
Remote attackers can bypass certificate validation restrictions by using X.509 V1 certificates as intermediate CAs in GnuTLS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-5138?
CVE-2009-5138 is a medium-severity vulnerability in Gnu Gnutls, published on 6 Mar 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-264
Which versions are affected by CVE-2009-5138?
It affects 1 product.
Products include Gnu Gnutls.
How do I fix CVE-2009-5138?
Upgrade to a fixed version.
Is CVE-2009-5138 being exploited?
There is no known exploitation of CVE-2009-5138 in the wild and no public exploit code.
Other vulnerabilities in Gnu Gnutls
Sources
Also known as GHSA-754r-c6vv-mv5g.