CVE-2016-7796

moderate-risk

Published 2016-10-13

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.

Do I need to act?

0.39% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.5/10 Medium

LOCAL / LOW complexity

Affected Products (13)

Systemd

Suse Linux Enterprise Desktop

Suse Linux Enterprise Server For Sap

Enterprise Linux Server

Enterprise Linux Workstation

Systemd

Suse Linux Enterprise Software Development Kit

Suse Linux Enterprise Server

Enterprise Linux Desktop

Enterprise Linux Hpc Node

Affected Vendors

Systemd Project Novell Redhat

References (20)

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00015.html

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00016.html

http://rhn.redhat.com/errata/RHSA-2017-0003.html

Third Party Advisory http://www.openwall.com/lists/oss-security/2016/09/30/1

Third Party Advisory http://www.securityfocus.com/bid/93250

http://www.securitytracker.com/id/1037320

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1381911

Exploit https://github.com/systemd/systemd/issues/4234#issuecomment-250441246

Third Party Advisory https://rhn.redhat.com/errata/RHBA-2015-2092.html

Exploit https://www.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet