lib/gnutls_pk.c in libgnutls in GnuTLS 2.5.0 through 2.6.5 generates RSA keys stored in DSA structures, instead of the intended DSA keys, which might allow remote attackers to spoof signatures on certificates or have unspecified other impact by leveraging an invalid DSA key.
article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3516
lists.gnu.org/archive/html/help-gnutls/2009-04/msg00018.html
secunia.com/advisories/34842
secunia.com/advisories/35211
security.gentoo.org/glsa/glsa-200905-04.xml
www.mandriva.com/security/advisories?name=MDVSA-2009:116
www.securityfocus.com/bid/34783
www.securitytracker.com/id?1022158
www.vupen.com/english/advisories/2009/1218