Skip to content
Fencer Vulns
high 7.3

CVE-2019-18934 json

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 cra…

published 2019-11-19 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8607

cvss
7.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

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.

Patch / fix

  • unbound Debian 14, Debian 13, Debian 12 1.9.6-1

debian advisories DEBIAN-CVE-2019-18934

  • unbound RHEL 8 1.7.3-10.el8
  • unbound-libs RHEL 8 1.7.3-10.el8
  • python3-unbound RHEL 8 1.7.3-10.el8

red hat advisories RHSA-2020:1716

  • unbound SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 1.6.8-3.6.1
  • unbound SLE Module for Basesystem 15 SP2, SLE Module for Basesystem 15 SP1 1.6.8-10.3.1

suse advisories SUSE-SU-2020:1819-1SUSE-SU-2020:1772-1

  • unbound openSUSE Tumbleweed 1.13.2-1.2
  • unbound openSUSE Leap 15.2 1.6.8-lp152.9.3.1
  • libunbound-devel-mini openSUSE Leap 15.2 1.6.8-lp152.9.3.1
  • unbound openSUSE Leap 15.1 1.6.8-lp151.8.3.1
  • libunbound-devel-mini openSUSE Leap 15.1 1.6.8-lp151.8.3.1

opensuse advisories openSUSE-SU-2024:11005-1openSUSE-SU-2020:0913-1openSUSE-SU-2020:0912-1

  • unbound Alpine 3.10 1.9.1-r4
  • unbound Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 1.9.5-r0
  • unbound Alpine 3.8 1.7.3-r2
  • unbound Alpine 3.9 1.8.3-r3

alpine advisories ALPINE-CVE-2019-18934

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-18934 updated cvss 5.6

unbound: command injection with data coming from a specially crafted IPSECKEY answer

  • Red Hat Enterprise Linux 7 unbound, unbound-libs, unbound-python
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) unbound 1.7.3-10.el8, unbound-libs 1.7.3-10.el8, python3-unbound 1.7.3-10.el8
    fixed: vendor fix RHSA-2020:1716
  • Red Hat Enterprise Linux 6 unbound, unbound-libs, unbound-python
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.20% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2019/11/19/1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.