The gnutls_x509_crt_get_serial function in the GnuTLS library before 1.2.1, when running on big-endian, 64-bit platforms, calls the asn1_read_value with a pointer to the wrong data type and the wrong length value, which allows remote attackers to bypass the certificate revocation list (CRL) check and cause a stack-based buffer overflow via a crafted X.509 certificate, related to extraction of a serial number.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://www.redhat.com/support/errata/RHSA-2010-0167.html | vendor advisory |
| http://secunia.com/advisories/39127 | third party advisory |
| http://www.mandriva.com/security/advisories?name=MDVSA-2010:089 | vendor advisory |
| http://www.securityfocus.com/bid/38959 | vdb entry |
| http://www.vupen.com/english/advisories/2010/0713 | patch vendor advisory vdb entry |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9759 | signature vdb entry |
| http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/4230 | exploit |
| https://bugzilla.redhat.com/show_bug.cgi?id=573028 | exploit |
| http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html | vendor advisory |
| http://www.vupen.com/english/advisories/2010/1054 | vdb entry |