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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).
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | Upgrade gnutls-develUpgrade gnutlsUpgrade gnutls-utils | Dec 1, 2016 | Nov 12, 2008 |
| Freebsd | — | Upgrade gnutls | Dec 10, 2025 | Nov 16, 2008 |
| Gentoo Linux | — | Upgrade net-libs/gnutls. | Oct 30, 2017 | Nov 12, 2008 |
| Oracle_linux | — | Upgrade gnutlsUpgrade gnutls-develUpgrade gnutls-utils | Oct 16, 2024 | Nov 13, 2008 |
| Suse | — | Upgrade libgnutls26Upgrade libgnutls28-32bitUpgrade libgnutls-devel-docUpgrade libgnutls28Upgrade gnutlsUpgrade libgnutls30-32bitUpgrade libgnutls-dane0Upgrade libgnutls-extra-develUpgrade libgnutlsxx30Upgrade libgnutls26-x86Upgrade libgnutlsxx28Upgrade libgnutls-develUpgrade libgnutls26-32bitUpgrade libgnutls30Upgrade libgnutls-openssl-develUpgrade libgnutls-openssl27Upgrade libgnutls-extra26Upgrade libgnutlsxx-devel | Feb 17, 2015 | Jun 28, 2013 |
| Ubuntu | — | Upgrade libgnutls13Upgrade libgnutls26Upgrade libgnutls12 | Nov 8, 2024 | Nov 13, 2008 |
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