Cisco Unified Communications API Improper Auth Causing High CPU DoS
CVE-2023-20259 Published on October 4, 2023
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.
Vulnerability Analysis
CVE-2023-20259 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2023-20259 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2023-20259
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Affected Versions
Cisco Emergency Responder:- Version 12.5(1)SU7 is affected.
- Version 14 is affected.
- Version 14SU3 is affected.
- Version 14SU3 is affected.
- Version 12.5(1)SU7 is affected.
- Version 12.5(1)SU7a is affected.
- Version 14SU3 is affected.
- Version 12.5(1)SU7 is affected.
- Version 14SU3 is affected.
- Version 14SU3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.