| Name | CVE-2023-2828 |
| Description | Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit. It has been discovered that the effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3498-1, DSA-5439-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| bind9 (PTS) | buster | 1:9.11.5.P4+dfsg-5.1+deb10u7 | vulnerable |
| buster (security) | 1:9.11.5.P4+dfsg-5.1+deb10u10 | fixed | |
| bullseye | 1:9.16.44-1~deb11u1 | fixed | |
| bullseye (security) | 1:9.16.48-1 | fixed | |
| bookworm | 1:9.18.19-1~deb12u1 | fixed | |
| bookworm (security) | 1:9.18.24-1 | fixed | |
| sid, trixie | 1:9.19.21-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| bind9 | source | buster | 1:9.11.5.P4+dfsg-5.1+deb10u9 | DLA-3498-1 | ||
| bind9 | source | bullseye | 1:9.16.42-1~deb11u1 | DSA-5439-1 | ||
| bind9 | source | bookworm | 1:9.18.16-1~deb12u1 | DSA-5439-1 | ||
| bind9 | source | (unstable) | 1:9.18.16-1 |
https://kb.isc.org/docs/cve-2023-2828
https://downloads.isc.org/isc/bind9/9.18.16/patches/0001-CVE-2023-2828.patch
https://downloads.isc.org/isc/bind9/9.16.42/patches/0001-CVE-2023-2828.patch