Vulnerabilities > CVE-2024-20508 - Out-of-bounds Write vulnerability in Cisco Unified Threat Defense Snort Intrusion Prevention System Engine

CVSS 6.5 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

LOW

Availability impact

LOW

network

low complexity

cisco

CWE-787

NVD

Published: 2024-09-25

Updated: 2024-10-03

Summary

A vulnerability in Cisco Unified Threat Defense (UTD) Snort Intrusion Prevention System (IPS) Engine for Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass configured security policies or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of HTTP requests when they are processed by Cisco UTD Snort IPS Engine. An attacker could exploit this vulnerability by sending a crafted HTTP request through an affected device. A successful exploit could allow the attacker to trigger a reload of the Snort process. If the action in case of Cisco UTD Snort IPS Engine failure is set to the default, fail-open, successful exploitation of this vulnerability could allow the attacker to bypass configured security policies. If the action in case of Cisco UTD Snort IPS Engine failure is set to fail-close, successful exploitation of this vulnerability could cause traffic that is configured to be inspected by Cisco UTD Snort IPS Engine to be dropped.

Vulnerable Configurations

Part	Description	Count
OS	Cisco Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.6.1A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.6.2 Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.6.6 Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.7.1A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.7.2 Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.8.1A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.9.5A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.11.1A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.1A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.2 Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.3 Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.3A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.12.4 Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.13.1A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.14.1A Cisco Unified Threat Defense Snort Intrusion Prevention System Engine 17.15.1A	16

Common Weakness Enumeration (CWE)

CWE-787 - Out-of-bounds Write

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-utd-snort3-dos-bypas-b4OUEwxD