Zero Day Initiative Advisory 11-308 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Cisco WebEx Player. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists in ATAS32.DLL during the parsing of values defined within the WRF file format. The vulnerable code trusts the linesProcessed value from the file, and uses it in some logic to determine the destination pointer for a memcpy. By supplying an overly large linesProcessed value, the subtraction would cause an integer underflow and allows an attacker control of the destination buffer pointer. This can be further leveraged to execute arbitrary code under the context of the current user.
80b8fd02c6cb7ca21bac8379fedbed3901106726a585dd6053d06553ac42c269Cisco Security Advisory - Multiple buffer overflow vulnerabilities exist in the Cisco WebEx Recording Format (WRF) player. In some cases, exploitation of the vulnerabilities could allow a remote attacker to execute arbitrary code on the system with the privileges of a targeted user. Cisco has released free software updates that address these vulnerabilities.
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