CVE-2023-4236

NameCVE-2023-4236
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1052417

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bind9 (PTS)buster1:9.11.5.P4+dfsg-5.1+deb10u7fixed
buster (security)1:9.11.5.P4+dfsg-5.1+deb10u9fixed
bullseye (security), bullseye1:9.16.44-1~deb11u1fixed
bookworm, bookworm (security)1:9.18.19-1~deb12u1fixed
sid, trixie1:9.19.17-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bind9sourcebuster(not affected)
bind9sourcebullseye(not affected)
bind9sourcebookworm1:9.18.19-1~deb12u1
bind9source(unstable)1:9.19.17-11052417

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)

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