What’s Vulnerable › Vulnerabilities
CVE-2015-3405
- Severity: high (CVSS 7.5 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 5.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2017-08-09 · updated 2026-06-17
- Weakness: CWE-331
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.
Affected products
- Debian Linux: 7.0, 8.0
- Fedoraproject Fedora: 21
- NTP: 4.2.8-p1, 4.2.8-p2, 4.2.8-p2-rc1, 4.3.0, 4.3.1, 4.3.2 (+9)
- openSUSE Suse Linux Enterprise Server: 11.0-sp3
- Opensuse Project Suse Linux Enterprise Desktop: 11.0-sp3
- RedHat Enterprise Linux Desktop: 6.0
- RedHat Enterprise Linux For Ibm Z Systems: 6.0
- RedHat Enterprise Linux For Power Big Endian: 6.0
- RedHat Enterprise Linux For Scientific Computing: 6.0
- RedHat Enterprise Linux Server: 6.0
- RedHat Enterprise Linux Server From Rhui 6: 6.0
- RedHat Enterprise Linux Workstation: 6.0
- SUSE Linux Enterprise: 11.0-sp3
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
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