CVE-2016-7796

MEDIUM

systemd - Denial of Service via Zero-Length Notify Socket Message

Title source: llm

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.

References (10)

Core 10

Core References

Third Party Advisory mailing-list x_refsource_mlist

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

Exploit, Technical Description, Third Party Advisory x_refsource_misc

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

Exploit, Patch, Vendor Advisory x_refsource_confirm

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

Third Party Advisory vendor-advisory x_refsource_suse

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

Issue Tracking, Third Party Advisory, VDB Entry x_refsource_confirm

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

Vendor Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory vendor-advisory x_refsource_suse

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

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

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

Third Party Advisory vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/93250

Third Party Advisory vendor-advisory x_refsource_redhat

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

Scores

CVSS v3 5.5

EPSS 0.0039

EPSS Percentile 59.9%

Attack Vector LOCAL

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

Details

CWE

CWE-20

Status published

Products (12)

novell/suse_linux_enterprise_desktop 12 sp1

novell/suse_linux_enterprise_server 12.0 (2 CPE variants)

novell/suse_linux_enterprise_server_for_sap 12.0

novell/suse_linux_enterprise_software_development_kit 12.0 sp1

redhat/enterprise_linux_desktop 7.0

redhat/enterprise_linux_hpc_node 7.0

redhat/enterprise_linux_server 7.0

redhat/enterprise_linux_workstation 7.0

systemd_project/systemd 209

systemd_project/systemd 213

... and 2 more

Published Oct 13, 2016

Tracked Since Feb 18, 2026