Several months after trying to silence a researcher from discussing the flaw, Cisco has announced a critical failure in recent versions of its Internetwork Operating System, which runs on its routers and other devices. Specifically, says a report in CIO:

The IOS firewall-authentication proxy for FTP and Telnet sessions featured in specific versions of the IOS software -- 12.2 through 12.4 -- is "vulnerable to a remotely exploitable buffer-overflow condition."

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