CVE-2009-2730

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-08-12 · updated 2026-06-16
Weakness: CWE-310

Description

libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) 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.

Affected products

[UNKNOWN] gnutls: through 2.8.1; 1.0.16, 1.0.17, 1.0.18, 1.0.19, 1.0.20, 1.0.21 (+114)

References

http://article.gmane.org/gmane.network.gnutls.general/1733
http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
http://secunia.com/advisories/36266
http://secunia.com/advisories/36496
http://www.openwall.com/lists/oss-security/2009/08/14/6
http://www.redhat.com/support/errata/RHSA-2009-1232.html
http://www.securityfocus.com/archive/1/507985/100/0/threaded
http://www.securitytracker.com/id?1022777
http://www.vmware.com/security/advisories/VMSA-2009-0016.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/52404
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10778
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8409

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