CVE-2016-7795

low-risk

Published 2016-10-13

The manager_invoke_notify_message function in systemd 231 and earlier allows local users to cause a denial of service (assertion failure and PID 1 hang) via a zero-length message received over a notify socket.

Do I need to act?

0.16% 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 (2)

Ubuntu Linux

Systemd

Affected Vendors

Canonical Systemd Project

References (18)

http://rhn.redhat.com/errata/RHSA-2016-2610.html

http://rhn.redhat.com/errata/RHSA-2016-2694.html

Third Party Advisory http://www.openwall.com/lists/oss-security/2016/09/28/9

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

Third Party Advisory http://www.securityfocus.com/bid/93223

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

Third Party Advisory http://www.ubuntu.com/usn/USN-3094-1

Exploit https://github.com/systemd/systemd/issues/4234

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