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TITLE:
Cisco IOS TCP Connection Handling Denial of Service

SECUNIA ADVISORY ID:
SA40958

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40958/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40958

RELEASE DATE:
2010-08-14

DISCUSS ADVISORY:
http://secunia.com/advisories/40958/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40958/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=40958

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

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

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

The vulnerability exists due to an error in the handling of TCP
packets during the establishment phase. This can be exploited to
cause TCP connections to remain in a half-open state and consume
system resources.

Successful exploitation does not require a full TCP three-way
handshake and is possible e.g. via spoofed TCP packets.

The vulnerability is reported in Cisco IOS Software Release 15.1T.

SOLUTION:
Update to Cisco IOS Software Release 15.1(2)T0a or 15.1(2)T1 when it
becomes available on 20-AUG-2010.

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

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20100812-tcp.shtml

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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