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  Secunia CSI
+ Microsoft SCCM
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= Extensive Patch Management

http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/


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TITLE:
Cisco IOS TCP Options Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA39078

VERIFY ADVISORY:
http://secunia.com/advisories/39078/

DESCRIPTION:
A vulnerability has been reported in Cisco IOS, which can be
exploited by malicious people to cause a DoS (Denial of Service).

An error exists when processing TCP options during the TCP session
establishment phase. This can be exploited to cause a vulnerable
device to reload via a specially crafted TCP segment.

Successful exploitation requires that the vulnerable device is
configured to use a specific TCP window size, Path MTU Discovery for
TCP, or Stateful NAT with TCP. Exploitation through the BGP TCP port
179 may also be possible (please see the vendor advisory for
details).

SOLUTION:
Update to the fixed version (please see the vendor's advisories for
details).

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20100324-tcp.shtml

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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