xine-lib 1.1.12, and other 1.1.15 and earlier versions, does not properly handle (a) negative and (b) zero values during unspecified read function calls in input_file.c, input_net.c, input_smb.c, and input_http.c, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via vectors such as (1) a file or (2) an HTTP response, which triggers consequences such as out-of-bounds reads and heap-based buffer overflows.
https://www.redhat.com/archives/fedora-package-announce/2009-January/msg00555.html
https://www.redhat.com/archives/fedora-package-announce/2008-September/msg00385.html
https://www.redhat.com/archives/fedora-package-announce/2008-September/msg00174.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/44651
http://www.securityfocus.com/bid/30797
http://www.securityfocus.com/archive/1/495674/100/0/threaded
http://www.ocert.org/analysis/2008-008/analysis.txt
http://www.mandriva.com/security/advisories?name=MDVSA-2009:020
http://securityreason.com/securityalert/4648
http://secunia.com/advisories/33544
http://secunia.com/advisories/31827
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00002.html