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No exploitation reportedFix available

CVE-2019-18934

No exploitation reported by the sources we read.

  • Published2019-11-19
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2019-11-1918:15CVE publishedNVD

Versions per branch

NVD
Opensuse leap
BranchAffectedFixed in
15.1= 15.1no fix published
15.2= 15.2no fix published
Fedoraproject fedora
BranchAffectedFixed in
31.x= 31no fix published
Nlnetlabs unbound
BranchAffectedFixed in
1.x≥ 1.6.4, ≤ 1.9.4no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • unboundSUSE:Linux Enterprise Server for SAP Applications 15all versions · fixed in 1.6.8-3.6.1
  • unboundSUSE:Linux Enterprise Server 15-LTSSall versions · fixed in 1.6.8-3.6.1
  • unboundSUSE:Linux Enterprise Module for Basesystem 15 SP2all versions · fixed in 1.6.8-10.3.1
  • unboundSUSE:Linux Enterprise Module for Basesystem 15 SP1all versions · fixed in 1.6.8-10.3.1
  • unboundSUSE:Linux Enterprise High Performance Computing 15-LTSSall versions · fixed in 1.6.8-3.6.1
  • unboundSUSE:Linux Enterprise High Performance Computing 15-ESPOSall versions · fixed in 1.6.8-3.6.1
  • unboundRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:1.7.3-10.el8and 7 other packages
  • unboundopenSUSE:Tumbleweedall versions · fixed in 1.13.2-1.2

25 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-18934 Red Hat Product Security39 products fixed · 5 known affected

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

    unbound as a component of Red Hat Enterprise Linux 7 · unbound-devel as a component of Red Hat Enterprise Linux 7 · unbound-libs as a component of Red Hat Enterprise Linux 7 · +2 more

  • RHSA-2020:1716 Red Hat Product Security39 products fixed

    Red Hat Security Advisory: unbound security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2020:1716 · 39 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. Workaround from the vendor Red Hat Product Security RHSA-2020:1716 · 39 products* Do not enable ipsecmod in the unbound.conf configuration file nor via unbound-control, if DNSSEC based Opportunistic IPsec is not used. * Use the `username` option in unbound.conf to make unbound drop privileges and reduce the impact of a successful attack. * Enable SELinux to prevent unbound fro…
  3. No fix planned, says the vendor Red Hat Product Security CVE-2019-18934 · 5 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
2019-11-19
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-p35c-m7rx-rcvq

Frequently asked questions

What is CVE-2019-18934?

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.

Is CVE-2019-18934 actively exploited?

Active exploitation of CVE-2019-18934 has not been confirmed. Its EPSS score was 3.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-18934?

CVE-2019-18934 has a CVSS v3 base score of 7.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

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