CVE-2019-18934 — Unbound 1
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 t
Published
2019-11-19T17:30:01.000Z
Last modified
2024-08-05T02:02:39.825Z
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2019-11-19T17:30:01.000Z
- Last modified: 2024-08-05T02:02:39.825Z
09References
- www.openwall.com — http://www.openwall.com/lists/oss-security/2019/11/19/1
- www.nlnetlabs.nl — https://www.nlnetlabs.nl/downloads/unbound/CVE-2019-18934.txt
- github.com — https://github.com/NLnetLabs/unbound/blob/release-1.9.5/doc/Changelog
- www.nlnetlabs.nl — https://www.nlnetlabs.nl/news/2019/Nov/19/unbound-1.9.5-released/
- lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html
- lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html
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