Cisco Bug: CSCul26755 - INSPECT ICMP ERROR ICMP HEADER AFTER UN_NAT DOES NOT MATCH IP DST ADDR
Last Modified
May 07, 2020
Products (1)
- Cisco ASA 5500-X Series Firewalls
Known Affected Releases
8.4(5.7) 8.4(7.4) 9.1(1.5) 9.1(3.107)
Description (partial)
Symptom: When several ICMP error packets come back to an ASA performing PAT/NAT with inspect icmp error enabled, the inspection will rewrite the original IP addresses in the ICMP header by matching the xlate. Then, this packet should be forwarded back to the originating host using the same original IP as the destination IP address. These two IP address do not match and it should. The packet is then forwarded wrongly to the wrong host. Conditions: icmp inspect error configured
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