A vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Cisco CallManager. Authentication is not required to exploit this vulnerability. The specific flaw exists within the CTL Provider Service, CTLProvider.exe, which binds to TCP port 2444. The service operates over a SSL encrypted transport. Due to a logic flaw in the way data is received in a loop a heap allocation can be arbitrarily overflown resulting in the control of subsequent heap chunks. This can lead to arbitrary code execution. Version 4.1(3) is affected.
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