CVE-2019-18934: OS Command Injection
First published: Tue Nov 19 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nlnetlabs Unbound | >=1.6.4<=1.9.4 | |
| Fedoraproject Fedora | =31 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html
- http://www.openwall.com/lists/oss-security/2019/11/19/1
- https://github.com/NLnetLabs/unbound/blob/release-1.9.5/doc/Changelog
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MOCR6JP7MSRARTOGEHGST64G4FJGX5VK/
- https://www.nlnetlabs.nl/downloads/unbound/CVE-2019-18934.txt
- https://www.nlnetlabs.nl/news/2019/Nov/19/unbound-1.9.5-released/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MOCR6JP7MSRARTOGEHGST64G4FJGX5VK/
Frequently Asked Questions
What is CVE-2019-18934?
CVE-2019-18934 is a vulnerability in the ipsec module of Unbound 1.6.4 through 1.9.4 that can lead to shell code execution.
How severe is CVE-2019-18934?
CVE-2019-18934 is considered to be a high severity vulnerability with a CVSS score of 7.3.
Which software versions are affected by CVE-2019-18934?
Unbound versions 1.6.4 through 1.9.4, Fedora 31, openSUSE Leap 15.1, and openSUSE Leap 15.2 are affected by CVE-2019-18934.
How can I exploit CVE-2019-18934?
To exploit CVE-2019-18934, an attacker needs to send a specially crafted answer to the vulnerable Unbound server.
How can I mitigate CVE-2019-18934?
To mitigate CVE-2019-18934, it is recommended to update to a patched version of Unbound and disable the ipsec module if it is not needed.
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