Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
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A denial of service (DoS) vulnerability exists in the Cisco Physical Access Gateway. There are no workarounds available to mitigate the vulnerability. This vulnerability has been corrected in Cisco Physical Access Gateway software version 1.1. Cisco has released software updates that address this vulnerability.
This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20090624-gateway.
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Vulnerable Products
Cisco Physical Access Gateway running software versions prior to 1.1 are vulnerable.
Products Confirmed Not Vulnerable
Cisco Physical Access Gateway running software versions 1.1 or later are not vulnerable. No other Cisco products are currently known to be affected by this vulnerability.
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The Cisco Physical Access Gateway is the primary means for the Cisco Physical Access Control solution to connect door hardware, such as locks and readers, to an IP network. Certain crafted TCP port 443 packets may cause a memory leak that could lead to a denial of service (DoS) condition in the Cisco Physical Access Gateway. A TCP three-way handshake is needed to exploit this vulnerability.
This vulnerability is documented in Cisco Bug ID CSCsu95864 ( registered customers only) and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2009-1163.
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No workarounds are available; however, mitigations that can be deployed on Cisco devices within the network are available in the Cisco Applied Mitigation Bulletin companion document for this advisory, which is available at the following link:
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When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.
This vulnerability has been corrected in Cisco Physical Access Gateway software version 1.1 and can be downloaded from the following link:
https://sec.cloudapps.cisco.com/support/downloads/go/Redirect.x?mdfid=280588231
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The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.
This vulnerability was found during internal testing.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Revision 1.0
2009-June-24
Initial public release
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