CVE-2023-20259 Denial of service in Cisco Emergency Responder
Unauthenticated remote attackers can cause high CPU utilization and denial of service in Cisco Unified Communications products via crafted HTTP requests.
- 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-2023-20259?
CVE-2023-20259 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 4 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in an API endpoint of multiple Cisco Unified Communications Products could allow an unauthenticated, remote attacker to cause high CPU utilization, which could impact access to the web-based management interface and cause delays with call processing. This API is not used for device management and is unlikely to be used in normal operations of the device. This vulnerability is due to improper API authentication and incomplete validation of the API request. An attacker could exploit this vulnerability by sending a crafted HTTP request to a specific API on the device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition due to high CPU utilization, which could negatively impact user traffic and management access. When the attack stops, the device will recover without manual intervention.
Weakness: CWE-400
Which versions are affected by CVE-2023-20259?
It affects 5 products.
Products include Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager, Cisco Unified Communications Manager Im \& Presence Service, Cisco Unity Connection.
How do I fix CVE-2023-20259?
No fix has been published for CVE-2023-20259 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-2023-20259 being exploited?
There is no known exploitation of CVE-2023-20259 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unified Communications Manager
- CVE-2008-1154 Auth bypass in n/a
- CVE-2023-20101 Hardcoded credentials in Cisco Emergency Responder
- CVE-2017-12337 Hardcoded credentials in Cisco Voice Operating System
- CVE-2016-6468 Cross-site request forgery in Cisco Emergency Responder
- CVE-2017-6779 Denial of service in Multiple Cisco Products unknown
Sources
Also known as GHSA-x67r-8jfc-3r5m.