CVE-2016-4957
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
7.5
Description
ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.
Predictions
Exploit likelihood
83%
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 | 42.1 | affected | |
| suse | 13.2 | affected | |
| suse | 12 | affected | |
| suse | 11 | affected | |
| debian | bullseye | fixed | 1:4.2.8p8+dfsg-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.3.92 | |
| suse | manager_proxy | 2.1 | |
| suse | openstack_cloud | 5 | |
References
- https://www.suse.com/security/cve/CVE-2016-4957.html
- http://bugs.ntp.org/3046
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
- http://support.ntp.org/bin/view/Main/NtpBug3046
- http://support.ntp.org/bin/view/Main/SecurityNotice
- http://www.kb.cert.org/vuls/id/321640
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.securitytracker.com/id/1036037
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
- https://security.gentoo.org/glsa/201607-15
- https://security-tracker.debian.org/tracker/CVE-2016-4957
CWEs
CWE-476
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.