PT-2024-4188 · Cisco · Snort Intrusion Prevention System

Published 2024-05-22 · Updated 2025-07-03 · CVE-2024-20363

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco products (affected versions not specified)

Description The issue is related to a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine, which could allow an unauthenticated, remote attacker to bypass the configured rules on an affected system. This is due to incorrect HTTP packet handling. An attacker could exploit this by sending crafted HTTP packets through an affected device, potentially allowing uninspected traffic onto the network. The vulnerability is also associated with an authentication bypass via spoofing, enabling a remote attacker to circumvent existing security restrictions.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-290

Related Identifiers

BDU:2024-04673

CVE-2024-20363

Affected Products

Snort Intrusion Prevention System

References · 8

• https://bdu.fstec.ru/vul/2024-04673 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-ips-bypass-uE69KBMd · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-20363 · Security Note
• https://osv.dev/vulnerability/CVE-2024-20363 · Vendor Advisory
• https://twitter.com/linuxpatch/status/1793343381541642246 · Twitter Post
• https://t.me/cvenotify/127631 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1793352038685823255 · Twitter Post
• https://twitter.com/CVEnew/status/1793384165095653612 · Twitter Post