| Name | CVE-2023-4236 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1052417 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| bind9 (PTS) | jessie, jessie (lts) | 1:9.9.5.dfsg-9+deb8u31 | fixed |
| stretch (security) | 1:9.10.3.dfsg.P4-12.3+deb9u12 | fixed |
| stretch (lts), stretch | 1:9.10.3.dfsg.P4-12.3+deb9u17 | fixed |
| buster, buster (lts) | 1:9.11.5.P4+dfsg-5.1+deb10u13 | fixed |
| buster (security) | 1:9.11.5.P4+dfsg-5.1+deb10u11 | fixed |
| bullseye | 1:9.16.50-1~deb11u2 | fixed |
| bullseye (security) | 1:9.16.50-1~deb11u1 | fixed |
| bookworm (security), bookworm | 1:9.18.28-1~deb12u2 | fixed |
| trixie | 1:9.20.4-2 | fixed |
| sid | 1:9.20.4-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| bind9 | source | jessie | (not affected) | | | |
| bind9 | source | stretch | (not affected) | | | |
| bind9 | source | buster | (not affected) | | | |
| bind9 | source | bullseye | (not affected) | | | |
| bind9 | source | bookworm | 1:9.18.19-1~deb12u1 | | | |
| bind9 | source | (unstable) | 1:9.19.17-1 | | | 1052417 |
Notes
[bullseye] - bind9 <not-affected> (Vulnerable code introduced later)
[buster] - bind9 <not-affected> (Vulnerable code introduced later)
https://kb.isc.org/docs/cve-2023-4236
https://gitlab.isc.org/isc-projects/bind9/-/commit/18efa454a98759bf4f3ca806d9a6ef881ff9648d (v9.18.19)
[stretch] - bind9 <not-affected> (Vulnerable code introduced later)
[jessie] - bind9 <not-affected> (Vulnerable code introduced later)