CVE-2015-1798
low
CVSS v3
—
CVSS v4 NEW
—
VIR risk
1.8
Description
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.
Predictions
Exploit likelihood
20%
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 | | |
| debian | bullseye | fixed | 1:4.2.6.p5+dfsg-6 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| ntp | ntp | {"endIncluding":"4.2.7p444"} | |
References
- https://www.suse.com/security/cve/CVE-2015-1798.html
- http://bugs.ntp.org/show_bug.cgi?id=2779
- http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html
- http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html
- http://marc.info/?l=bugtraq&m=143213867103400&w=2
- http://rhn.redhat.com/errata/RHSA-2015-1459.html
- http://support.apple.com/kb/HT204942
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd
- http://tools.cisco.com/security/center/viewAlert.x?alertId=38276
- http://www.debian.org/security/2015/dsa-3223
- http://www.kb.cert.org/vuls/id/374268
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:202
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securityfocus.com/bid/73951
- http://www.securitytracker.com/id/1032032
- http://www.ubuntu.com/usn/USN-2567-1
- https://kc.mcafee.com/corporate/index?page=content&id=SB10114
- https://security.gentoo.org/glsa/201509-01
- https://security-tracker.debian.org/tracker/CVE-2015-1798
CWEs
CWE-17
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.