CVE-2023-5517

Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled

High · published February 13, 2024

CVSS v3.1
7.5
EPSS
1%
Percentile
69.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01287 · 69.9th percentile
Published
2024-02-13T14:04Z
EPSS history
Timeline
  • 13 FEB 14:04Z
    Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled
    cvelistv5