CVE-2016-7796
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
5.5
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.
Predictions
Exploit likelihood
55%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| suse | 12.0 | affected | |
| rhel | 7.0 | affected | |
| debian | bookworm | fixed | 231-9 |
| debian | bullseye | fixed | 231-9 |
| debian | forky | fixed | 231-9 |
| debian | sid | fixed | 231-9 |
| debian | trixie | fixed | 231-9 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| systemd_project | systemd | 209 | |
| systemd_project | systemd | 213 | |
| systemd_project | systemd | 214 | |
| systemd_project | systemd | 229 | |
| novell | suse_linux_enterprise_software_development_kit | 12.0 | |
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
- https://www.suse.com/security/cve/CVE-2016-7796.html
- https://security-tracker.debian.org/tracker/CVE-2016-7796
CWEs
CWE-20
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.