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Various Microsoft Windows operating systems are prone to a remotely exploitable stack-based buffer overrun via the PCT (Private Communications Transport) protocol. Successful exploitation of this issue could allow a remote attacker to execute malicious code on a vulnerable system, resulting in full system compromise. The vulnerability may also reportedly be exploitable by a local user who passes malicious parameters to the vulnerable component interactively or through another application. This issue is reported to only affect systems that have SSL enabled, such as web servers, but could also affect Windows 2000 Domain Controllers under some circumstances. For Windows Server 2003, PCT must be manually enabled in addition to enabling SSL support to be affected. Reportedly, both PCT 1.0 and SSL 2.0 must be enabled for successful exploitation. The DeepSight Threat Analysis team has observed exploit activity in the wild associated with this vulnerability.

Various Microsoft Windows operating systems are prone to a remotely exploitable stack-based buffer overrun via the PCT (Private Communications Transport) protocol. Successful exploitation of this issue could allow a remote attacker to execute malicious code on a vulnerable system, resulting in full system compromise. The vulnerability may also reportedly be exploitable by a local user who passes malicious parameters to the vulnerable component interactively or through another application. This issue is reported to only affect systems that have SSL enabled, such as web servers, but could also affect Windows 2000 Domain Controllers under some circumstances. For Windows Server 2003, PCT must be manually enabled in addition to enabling SSL support to be affected. Reportedly, both PCT 1.0 and SSL 2.0 must be enabled for successful exploitation. The DeepSight Threat Analysis team has observed exploit activity in the wild associated with this vulnerability.