Reported at http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001058.html "this release fixes several serious bugs that would make the DER decoder in libtasn1 crash on invalid input." GNU TLS includes Libtasn1, a library developed for ASN.1 strutures management which includes DER encoding and decoding. Several flaws were found in the way libtasn1 decodes DER. An attacker could create a carefully crafted invalid X.509 certificate in such a way that could trigger this flaw if parsed by an application linked to GNU TLS. This could lead to a denial of service (application crash). It is not yet known if this issue could be escalated to allow arbitrary code execution. In Red Hat Enterprise Linux 4, only Evolution makes use of this functionality.
Created attachment 124516 [details] proposed patch
Created attachment 124519 [details] Testcase
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2006-0207.html