CVE-2024-20363: snort — Fix

Description

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.

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CVSS v3.1 Score

5.8

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Weakness Type (CWE)

CWE-290 CWE-290

Affected Products

Vendor	Product	Versions
cisco	firepower_threat_defense	All
cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	All
cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	All
cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	All
cisco	unified_threat_defense_snort_intrusion_prevention_system_engine	All
cisco	snort	3.0.0-233 — 3.1.69.0

References

Advisories & Patches

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-ips-bypass-uE69KBMd https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-ips-bypass-uE69KBMd

Frequently Asked Questions

What is CVE-2024-20363? +

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. It has a CVSS v3.1 base score of 5.8 (MEDIUM).

How severe is CVE-2024-20363? +

CVE-2024-20363 has a CVSS v3.1 score of 5.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-20363? +

CVE-2024-20363 affects products from cisco, specifically: firepower_threat_defense, snort, unified_threat_defense_snort_intrusion_prevention_system_engine. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-20363? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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