Cisco Bug: CSCup37676 - OTV jumbo packet fragmentation and reassembly causes ASR1K CPP crash
Nov 27, 2020
- Cisco ASR 1000 Series Aggregation Services Routers
Known Affected Releases
Symptoms: A vulnerability in OTV processing code of Cisco IOS XE could allow an unauthenticated, adjacent attacker to cause a reload of the affected device. The vulnerability is due to improper processing of oversized OTV frames passing through an affected device. An attacker could exploit this vulnerability by sending a number of packets that are processed as oversized OTV frames that may require fragmentation and reassembly by an affected device. An exploit could allow the attacker to cause a reload of the affected device. Conditions: This has been seen on two ASR1002-X's running IOS-XE 03.10.01.S. Crash was seen when passing large packets across an OTV topology.
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