VAR-200212-0766

Vulnerability from variot - Updated: 2023-12-18 13:45

The Cisco Optical Service Module (OSM) for the Catalyst 6500 and 7600 series running Cisco IOS 12.1(8)E through 12.1(13.4)E allows remote attackers to cause a denial of service (hang) via a malformed packet. A vulnerability has been discovered in OSM Line Cards when installed in various Cisco devices. Cisco has reported that a denial of service may occur when processing an irregularly constructed network packet. Exploitation of this issue will cause the Cisco device to no longer forward legitimate packets. Precise technical details regarding this vulnerability are not yet known. This BID will be updated as further information becomes available. An issue in the Fiber Services module's handling of specially crafted or corrupted packets from the internal network could allow a remote attacker to exploit this vulnerability to conduct a denial of service attack. When some malformed data frames arrive at the interface, the packet forwarding engine specifies the line card (line card) to rewrite the data frame. By using this method, legitimate information can be overwritten, causing the interface to stop accepting and forwarding network communications. The BUG ID of this vulnerability is: CSCdy29717

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