BIND 9 ECS Cache Clean Degradation (9.11.3-9.18.21)
CVE-2023-5680 Published on February 13, 2024

Cleaning an ECS-enabled cache may cause excessive CPU load
If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance. This issue affects BIND 9 versions 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2023-5680 is exploitable 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 small impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
LOW

Products Associated with CVE-2023-5680

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ISC BIND
 
NetApp Active Iq Unified Manager
 

Affected Versions

ISC BIND 9:

Exploit Probability

EPSS
0.11%
Percentile
28.61%

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.