CVE-2009-2730

Published: 12 August 2009

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.

Notes

patches in order:
http://git.savannah.gnu.org/cgit/gnutls.git/commit/?h=gnutls_2_8_x&id=a431be86124f900c4082e82d32917f86fcce461a
http://git.savannah.gnu.org/cgit/gnutls.git/commit/?h=gnutls_2_8_x&id=74b6d92f9675ce4e03642c4d6ced4a3a614b07f6
http://git.savannah.gnu.org/cgit/gnutls.git/commit/?h=gnutls_2_8_x&id=40081594e3de518b998f3e5177ed5a9f7707f2e8
http://git.savannah.gnu.org/cgit/gnutls.git/patch/?id=5a58e9d33448235377afd5fbfcee1683dc70eae3
http://git.savannah.gnu.org/cgit/gnutls.git/patch/?id=1ea190d216767dd4ab93b87361cbcb9d4fb3aafc

Status

References

• https://ubuntu.com/security/notices/USN-809-1
• https://www.cve.org/CVERecord?id=CVE-2009-2730
• NVD
• Launchpad
• Debian

Bugs

• https://bugs.launchpad.net/ubuntu/+source/gnutls26/+bug/413136