| Name | CVE-2019-18934 |
| Description | Unbound 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. |
| Source | CVE (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 Package | Release | Version | Status |
|---|
| unbound (PTS) | jessie, jessie (lts) | 1.4.22-3+deb8u4 | fixed |
| stretch | 1.6.0-3+deb9u2 | fixed |
| buster (security), buster, buster (lts) | 1.9.0-2+deb10u4 | vulnerable |
| bullseye | 1.13.1-1+deb11u2 | fixed |
| bullseye (security) | 1.13.1-1+deb11u3 | fixed |
| bookworm (security), bookworm | 1.17.1-2+deb12u2 | fixed |
| sid, trixie | 1.22.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| unbound | source | jessie | (not affected) | | | |
| unbound | source | stretch | (not affected) | | | |
| unbound | source | (unstable) | 1.9.6-1 | unimportant | | |
Notes
[stretch] - unbound <not-affected> (ipsecmod module introduced later)
[jessie] - unbound <not-affected> (ipsecmod module introduced later)
Debian binary packages not built with --enable-ipsecmod
https://nlnetlabs.nl/downloads/unbound/CVE-2019-18934.txt
https://github.com/NLnetLabs/unbound/commit/09845779d5f2c96e3064ff398cad65c08357cfbf
https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/