VULHUB ™

IOS is the Internet Operating System, used on Cisco routers. It is distributed and maintained by Cisco. Some versions of IOS may suffer from a denial of service condition when large port scans are performed through the vulnerable router. Reportedly, scanning a single host on all 65535 possible ports or scanning a class C network block for a single port are sufficient to exploit this vulnerability. This vulnerability has been reported to exist on a Cisco 2611 router running IOS 12.1(6.5). Cisco has reported that they are unable to reproduce this problem. It is possible that this issue is the result of a configuration error or site specific conditions.

IOS is the Internet Operating System, used on Cisco routers. It is distributed and maintained by Cisco. Some versions of IOS may suffer from a denial of service condition when large port scans are performed through the vulnerable router. Reportedly, scanning a single host on all 65535 possible ports or scanning a class C network block for a single port are sufficient to exploit this vulnerability. This vulnerability has been reported to exist on a Cisco 2611 router running IOS 12.1(6.5). Cisco has reported that they are unable to reproduce this problem. It is possible that this issue is the result of a configuration error or site specific conditions.