The _gnutls_x509_verify_certificate function in lib/x509/verify.c in libgnutls in GnuTLS before 2.6.1 trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate, which allows man-in-the-middle attackers to insert a spoofed certificate for any Distinguished Name (DN).
2008-11-13T01:00:01.177
2025-04-09T00:30:58.490
Deferred
CVSSv3.1: 5.9 (MEDIUM)
AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
Type | Vendor | Product | Version/Range | Vulnerable? |
---|---|---|---|---|
Application | gnu | gnutls | < 2.6.1 | Yes |
Operating System | fedoraproject | fedora | 8 | Yes |
Operating System | fedoraproject | fedora | 9 | Yes |
Operating System | canonical | ubuntu_linux | 6.06 | Yes |
Operating System | canonical | ubuntu_linux | 7.10 | Yes |
Operating System | canonical | ubuntu_linux | 8.04 | Yes |
Operating System | canonical | ubuntu_linux | 8.10 | Yes |
Operating System | debian | debian_linux | 4.0 | Yes |
Operating System | opensuse | opensuse | ≤ 11.1 | Yes |
Operating System | suse | linux_enterprise | 10.0 | Yes |
Operating System | suse | linux_enterprise | 11.0 | Yes |
Operating System | suse | linux_enterprise_server | 10 | Yes |
Operating System | suse | linux_enterprise_server | 11 | Yes |