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CVE-2016-7796

5.5 · MEDIUM

The manager_dispatch_notify_fd function in systemd allows local users to cause a denial of service (system hang) via a zero-length message received over a notify socket, which causes an error to be…

Published Oct 13, 2016CWE-20EPSS 0.85%

Overview

CVE-2016-7796 is a medium-severity vulnerability. It was published on October 13, 2016 and has a CVSS 3.0 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The manager_dispatch_notify_fd function in systemd allows local users to cause a denial of service (system hang) via a zero-length message received over a notify socket, which causes an error to be returned and the notification handler to be disabled.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2016-10/msg00015.htmlReflists.opensuse.org/opensuse-security-announce/2016-10/msg00016.htmlRefrhn.redhat.com/errata/RHSA-2017-0003.htmlRefwww.openwall.com/lists/oss-security/2016/09/30/1Refwww.securityfocus.com/bid/93250Refwww.securitytracker.com/id/1037320Refbugzilla.redhat.com/show_bug.cgi?id=1381911GitHubgithub.com/systemd/systemd/issues/4234#issuecomment-250441246Refrhn.redhat.com/errata/RHBA-2015-2092.htmlRefwww.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet

How CyberStrike helps

Frequently asked questions

What is CVE-2016-7796?

CVE-2016-7796 is a medium-severity vulnerability. It was published on October 13, 2016 and has a CVSS 3.0 base score of 5.5 (MEDIUM).

How severe is CVE-2016-7796?

This vulnerability has a CVSS 3.0 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2016-7796?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-7796?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-7796 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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