CVE-2024-20508 Denial of service in Cisco UTD SNORT IPS Engine Software
Remote attackers can cause a Snort process reload, leading to denial of service or security policy bypass depending on fail-open or fail-close configuration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-20508?
CVE-2024-20508 is a medium-severity denial of service vulnerability in Cisco UTD SNORT IPS Engine Software, published on 25 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2024-20508?
It affects 1 product.
Products include Cisco Unified Threat Defense Snort Intrusion Prevention System Engine.
How do I fix CVE-2024-20508?
No fix has been published for CVE-2024-20508 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-20508 being exploited?
There is no known exploitation of CVE-2024-20508 in the wild and no public exploit code.
Sources
Also known as GHSA-fmxj-97w3-xq3m.