CVE-2023-4236
7.5
HIGH
CVSS 3.1
EPSS 2.1%
Description
A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.
How to fix CVE-2023-4236
To remediate CVE-2023-4236, upgrade the affected package to a fixed version below.
- Alpine/bind—upgrade to 9.18.19-r0 or later
Is CVE-2023-4236 being exploited?
Low — EPSS is 2.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 9.18.0, < 9.18.19-r0
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 |