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.
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
Source: MITRE
Published: 2017-08-09
Updated: 2020-05-28
Type: CWE-331
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH