1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200901-10 / gnutls |
| Release Date | January 14, 2009 |
| Latest Revision | January 14, 2009: 01 |
| Impact | normal |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| net-libs/gnutls | < 2.4.1-r2 | >= 2.4.1-r2 | All supported architectures |
Related bugreports: #245850
A certificate validation error in GnuTLS might allow for spoofing attacks.
GnuTLS is an open-source implementation of TLS 1.0 and SSL 3.0.
Martin von Gagern reported that the _gnutls_x509_verify_certificate() function in lib/x509/verify.c trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate.
A remote attacker could exploit this vulnerability and spoof arbitrary names to conduct Man-In-The-Middle attacks and intercept sensitive information.
There is no known workaround at this time.
All GnuTLS users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.4.1-r2" |