Cisco Issues Fixes for Vulnerable Web Routers
Despite an alert sent out by Cisco Wednesday about a security flaw in its Internet routers, no customers have reported compromises to their systems.Cisco alerted its customers Wednesday about a serious security flaw in many of its Internet routers, which serve as key intersections in channeling Web and e-mail traffic from point to point. Cisco Systems Inc., based in San Jose, Calif., warned that attackers could use the flaw to seize control over specified vulnerable routersnot most routers currently in use.
As of late Wednesday afternoon, none of Ciscos customers had come forward to say their systems were compromised. "At this point, we do not know of any active exploitation of this vulnerability," Cisco spokesman John Noh told eWEEK.com.
- 12.2ZH and 12.2ZL-based trains
- 12.3-based trains
- 12.3T-based trains
- 12.4-based trains
- 12.4T-based trains
- "Block external access at the network boundary, unless service is required by external parties. To exploit this vulnerability, an attacker must be able to establish a TCP connection to the affected device. Block external access to the device if possible. Only allow connections from trusted hosts and networks."
- "Deploy network intrusion detection systems to monitor network traffic for malicious activity. Intrusion detection systems may detect attempts to exploit this and other latent vulnerabilities across the network. Examine IDS logs regularly for signs of attempted exploitation." "Successful exploitation of the vulnerability on Cisco IOS may result in a reload of the device or execution of arbitrary code," Cisco said in its advisory. "Repeated exploitation could result in a sustained DoS attack or execution of arbitrary code on Cisco IOS devices." Cisco itself has faced some hacking problems. In early August, the companys own Web site was compromised, and all user and customer passwords had to be reset. Check out eWEEK.coms for the latest security news, reviews and analysis. And for insights on security coverage around the Web, take a look at eWEEK.com Security Center Editor Larry Seltzers Weblog.