CVE-2016-7796 Information

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00015.html http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00016.html http://rhn.redhat.com/errata/RHSA-2017-0003.html http://www.openwall.com/lists/oss-security/2016/09/30/1 http://www.securityfocus.com/bid/93250 http://www.securitytracker.com/id/1037320 https://bugzilla.redhat.com/show_bug.cgi?id=1381911 https://github.com/systemd/systemd/issues/4234issuecomment-250441246 https://rhn.redhat.com/errata/RHBA-2015-2092.html https://www.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5