Cisco ISE CDP Process DoS via Unauth Adjacent Attack
CVE-2023-20213 Published on November 1, 2023
A vulnerability in the CDP processing feature of Cisco ISE could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition of the CDP process on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes CDP traffic. An attacker could exploit this vulnerability by sending crafted CDP traffic to the device. A successful exploit could cause the CDP process to crash, impacting neighbor discovery and the ability of Cisco ISE to determine the reachability of remote devices. After a crash, the CDP process must be manually restarted using the cdp enable command in interface configuration mode.
Vulnerability Analysis
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-2023-20213 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2023-20213
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Affected Versions
Cisco Identity Services Engine Software:- Version 2.6.0 is affected.
- Version 2.6.0 p1 is affected.
- Version 2.6.0 p2 is affected.
- Version 2.6.0 p3 is affected.
- Version 2.6.0 p5 is affected.
- Version 2.6.0 p6 is affected.
- Version 2.6.0 p7 is affected.
- Version 2.6.0 p8 is affected.
- Version 2.6.0 p9 is affected.
- Version 2.6.0 p10 is affected.
- Version 2.6.0 p11 is affected.
- Version 2.6.0 p12 is affected.
- Version 2.7.0 is affected.
- Version 2.7.0 p1 is affected.
- Version 2.7.0 p2 is affected.
- Version 2.7.0 p3 is affected.
- Version 2.7.0 p4 is affected.
- Version 2.7.0 p5 is affected.
- Version 2.7.0 p6 is affected.
- Version 2.7.0 p7 is affected.
- Version 2.7.0 p9 is affected.
- Version 3.0.0 is affected.
- Version 3.0.0 p1 is affected.
- Version 3.0.0 p2 is affected.
- Version 3.0.0 p3 is affected.
- Version 3.0.0 p4 is affected.
- Version 3.0.0 p5 is affected.
- Version 3.0.0 p6 is affected.
- Version 3.1.0 is affected.
- Version 3.1.0 p1 is affected.
- Version 3.1.0 p3 is affected.
- Version 3.1.0 p4 is affected.
- Version 3.1.0 p5 is affected.
- Version 3.1.0 p7 is affected.
- Version 3.2.0 is affected.
- Version 3.2.0 p1 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.