Vulnerability CVE-2016-7796
Published: 2016-10-13

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.

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
6.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Systemd project -> Systemd 
Redhat -> Enterprise linux desktop 
Redhat -> Enterprise linux hpc node 
Redhat -> Enterprise linux server 
Redhat -> Enterprise linux workstation 
Novell -> Suse linux enterprise desktop 
Novell -> Suse linux enterprise server 
Novell -> Suse linux enterprise server for sap 
Novell -> Suse linux enterprise software development kit 

 References:
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/4234#issuecomment-250441246
https://rhn.redhat.com/errata/RHBA-2015-2092.html
https://www.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet
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