DescriptionUnbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code execution after receiving a specially crafted answer. This issue can only be triggered if unbound was compiled with `--enable-ipsecmod` support, and ipsecmod is enabled and used in the configuration.
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)buster1.9.0-2+deb10u2vulnerable
buster (security)1.9.0-2+deb10u4vulnerable
bullseye (security)1.13.1-1+deb11u2fixed
bookworm (security)1.17.1-2+deb12u2fixed
trixie, sid1.20.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
unboundsourcejessie(not affected)
unboundsourcestretch(not affected)


[stretch] - unbound <not-affected> (ipsecmod module introduced later)
[jessie] - unbound <not-affected> (ipsecmod module introduced later)
Debian binary packages not built with --enable-ipsecmod

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