| VID |
29141 |
| Severity |
30 |
| Port |
161 |
| Protocol |
UDP |
| Class |
CISCO |
| Detailed Description |
Cisco IOS Software Release, 15.1(2)T is affected by a denial of service (DoS) vulnerability during the TCP establishment phase. The vulnerability could cause embryonic TCP connections to remain in a SYNRCVD or SYNSENT state. Enough embryonic TCP connections in these states could consume system resources and prevent an affected device from accepting or initiating new TCP connections, including any TCP-based remote management access to the device. No authentication is required to exploit this vulnerability. An attacker does not need to complete a three-way handshake to trigger this vulnerability therefore, this vulnerability can be exploited using spoofed packets. This vulnerability may be triggered by normal network traffic.
Cisco has released Cisco IOS Software Release 15.1(2)T0a to address this vulnerability.
* Note: This check solely relied on the version number of the remote system to assess these vulnerabilities, so this might be a false positive. Also, it requires a read access SNMP community string to collect the version number. To provide this access, add the valid community string to the check item, ""snmp/guessable/r"" from the Policy Editor. And also, if SGBP is disabled, please ignore this alert.
* References:
http://www.cisco.com/warp/public/707/cisco-sa-20100812-tcp.shtml
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4095e.shtml
* Platforms Affected:
Cisco IOS versions 15.1(2)T |
| Recommendation |
Upgrade to the fixed Cisco IOS version, as listed in Cisco Security Advisory (A device running Cisco IOS might reload when the web browser refreshes/reloads the SSL VPN portal page: CSCtr86328) at http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151-2TCAVS.html
Upgrades should be obtained through the Software Center on Cisco's worldwide web site at http://www.cisco.com |
| Related URL |
CVE-2012-1344 (CVE) |
| Related URL |
54835 (SecurityFocus) |
| Related URL |
(ISS) |
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