Secure Firewall ASA and FTD
CVE-2024-20363: Multiple Cisco products are affected by a in Cisco Firepower Threat Defense Software, Cisco UTD SNORT IPS Engine Software
Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass the configured rules on an affected system.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Cisco Firepower Threat Defense Software 7.4 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.6 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.12 | See the advisory |
| Cisco UTD SNORT IPS Engine Software 17.12 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass the configured rules on an affected system. This vulnerability is due to incorrect HTTP packet handling. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured IPS rules and allow uninspected traffic onto the network.
Exploitation
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.