BIND 9 named Stack Overflow via Recusive Client Quota Loop (9.16.339.16.41)
CVE-2023-2911 Published on June 21, 2023

Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0
If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2023-2911 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.

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

Products Associated with CVE-2023-2911

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2023-2911 are published in these products:

Canonical Ubuntu Linux
 
ISC BIND
 
Debian Linux
 
Fedora Project Fedora
 
NetApp Active Iq Unified Manager
 

Affected Versions

ISC BIND 9:

Exploit Probability

EPSS
0.19%
Percentile
40.90%

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.