CVE-2023-2911
7.5
HIGH
CVSS 3.1
EPSS 0.13%
Description
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.
How to fix CVE-2023-2911
To remediate CVE-2023-2911, upgrade the affected package to a fixed version below.
- —upgrade to 9.16.42-r0 or later
- —upgrade to 1:9.16.42-1~deb11u1 or later
Is CVE-2023-2911 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 9.16.42-r0
- from 0, < 1:9.16.42-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |