CVE-2009-2730
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 2.15% probability · 82th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-310
- Affected
- gnu/gnutls
- Source
- cve@mitre.org
EPSS 2.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://article.gmane.org/gmane.network.gnutls.general/1733Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
- http://secunia.com/advisories/36266Vendor Advisory
- 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
- https://rhn.redhat.com/errata/RHSA-2010-0095.html
- http://article.gmane.org/gmane.network.gnutls.general/1733Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
- http://secunia.com/advisories/36266Vendor Advisory
- 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
- https://rhn.redhat.com/errata/RHSA-2010-0095.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.