Improper SIP parsing in Cisco Unified CM and Unified CM SME leading to DOS
CVE-2024-20375 Published on August 21, 2024
A vulnerability in the SIP call processing function of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper parsing of SIP messages. An attacker could exploit this vulnerability by sending a crafted SIP message to an affected Cisco Unified CM or Cisco Unified CM SME device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition that interrupts the communications of reliant voice and video devices.
Vulnerability Analysis
CVE-2024-20375 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 Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2024-20375 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2024-20375
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Affected Versions
Cisco Unified Communications Manager:- Version 12.0(1)SU1 is affected.
- Version 12.0(1)SU2 is affected.
- Version 12.0(1)SU3 is affected.
- Version 12.0(1)SU4 is affected.
- Version 12.0(1)SU5 is affected.
- Version 12.5(1) is affected.
- Version 12.5(1)SU1 is affected.
- Version 12.5(1)SU2 is affected.
- Version 12.5(1)SU3 is affected.
- Version 12.5(1)SU4 is affected.
- Version 12.5(1)SU5 is affected.
- Version 12.5(1)SU6 is affected.
- Version 12.5(1)SU7 is affected.
- Version 12.5(1)SU7a is affected.
- Version 12.5(1)SU8 is affected.
- Version 12.5(1)SU8a is affected.
- Version 14 is affected.
- Version 14SU1 is affected.
- Version 14SU2 is affected.
- Version 14SU3 is affected.
- Version 15 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.