CVE-2015-3405
Description
ntp-keygen in ntp 4.2.8px before 4.2.8p2-RC2 and 4.3.x before 4.3.12 does not generate MD5 keys with sufficient entropy on big endian machines when the lowest order byte of the temp variable is between 0x20 and 0x7f and not #, which might allow remote attackers to obtain the value of generated MD5 keys via a brute force attack with the 93 possible keys.
Predictions
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
Fedora Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| 21 | Affected | — |
Red Hat Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| 6.0 | Affected | — |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| 11.0 | Affected | — |
Debian Mixed 3 releases
| Version | Status | Fixed in |
|---|---|---|
| bullseye | Fixed | 1:4.2.6.p5+dfsg-7 |
| 8.0 | Affected | — |
| 7.0 | Affected | — |
References
- http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156248.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00000.html
- http://rhn.redhat.com/errata/RHSA-2015-1459.html
- http://rhn.redhat.com/errata/RHSA-2015-2231.html
- http://www.debian.org/security/2015/dsa-3223
- http://www.debian.org/security/2015/dsa-3388
- http://www.openwall.com/lists/oss-security/2015/04/23/14
- 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/74045
- https://bugs.ntp.org/show_bug.cgi?id=2797
- https://bugzilla.redhat.com/show_bug.cgi?id=1210324
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03886en_us
- https://security-tracker.debian.org/tracker/CVE-2015-3405
CWEs
CWE-331
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.