CVE-2023-5517
7.5
HIGH
CVSS 3.1
EPSS 0.14%
Description
A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when: - `nxdomain-redirect <domain>;` is configured, and - the resolver receives a PTR query for an RFC 1918 address that would normally result in an authoritative NXDOMAIN response. This issue affects BIND 9 versions 9.12.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
How to fix CVE-2023-5517
To remediate CVE-2023-5517, upgrade the affected package to a fixed version below.
- —upgrade to 9.16.48-r0 or later
- —upgrade to 1:9.16.48-1 or later
Is CVE-2023-5517 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 9.16.48-r0
- from 0, < 1:9.16.48-1
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 |