// For flags

CVE-2024-20508

Cisco UTD Snort IPS Engine Software for Cisco IOS XE Software Security Policy Bypass and Denial of Service Vulnerability

Severity Score

5.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-11-08 CVE Reserved
  • 2024-09-25 CVE Published
  • 2024-10-04 EPSS Updated
  • 2024-11-12 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-122: Heap-based Buffer Overflow
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.12.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.12.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.12.2
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.12.2"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.13.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.13.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.12.3
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.12.3"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.12.3
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.12.3"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.15.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.15.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.9.5
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.9.5"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.6.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.6.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.8.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.8.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.6.2
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.6.2"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.7.2
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.7.2"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.12.4
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.12.4"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.14.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.14.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.11.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.11.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.7.1
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.7.1"
en
Affected
Cisco
Search vendor "Cisco"
Cisco UTD SNORT IPS Engine Software
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"
17.6.6
Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.6.6"
en
Affected