CVE-2024-33655

NameCVE-2024-33655
DescriptionThe DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by arranging for DNS queries to be accumulated for seconds, such that responses are later sent in a pulsing burst (which can be considered traffic amplification in some cases), aka the "DNSBomb" issue.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
unbound (PTS)jessie, jessie (lts)1.4.22-3+deb8u4vulnerable
stretch1.6.0-3+deb9u2vulnerable
buster, buster (lts)1.9.0-2+deb10u5vulnerable
buster (security)1.9.0-2+deb10u4vulnerable
bullseye1.13.1-1+deb11u2vulnerable
bullseye (security)1.13.1-1+deb11u4vulnerable
bookworm (security), bookworm1.17.1-2+deb12u2vulnerable
sid, trixie1.22.0-1fixed
unbound1.9 (PTS)stretch (security)1.9.0-2+deb10u2~deb9u2vulnerable
stretch (lts), stretch1.9.0-2+deb10u2~deb9u4vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
unboundsourcejessie(unfixed)end-of-life
unboundsourcestretch(unfixed)end-of-life
unboundsource(unstable)1.20.0-1
unbound1.9source(unstable)(unfixed)

Notes

[bookworm] - unbound <ignored> (Minor issue, too intrusive to backport)
[bullseye] - unbound <no-dsa> (Minor issue)
[buster] - unbound <ignored> (Not affected by DoS, intrusive changes)
https://nlnetlabs.nl/downloads/unbound/CVE-2024-33655.txt
Fixed by: https://github.com/NLnetLabs/unbound/commit/c3206f4568f60c486be6d165b1f2b5b254fea3de (release-1.20.0rc1)
[stretch] - unbound1.9 <ignored> (Not affected by DoS, intrusive changes)

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