CVE-2015-3405

Name	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-192-1, DSA-3223-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ntp (PTS)	jessie, jessie (lts)	1:4.2.6.p5+dfsg-7+deb8u3	fixed
	stretch	1:4.2.8p10+dfsg-3+deb9u2	fixed
	buster, buster (lts)	1:4.2.8p12+dfsg-4+deb10u1	fixed
	bullseye	1:4.2.8p15+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
ntp	source	squeeze	1:4.2.6.p2+dfsg-1+deb6u3	DLA-192-1
ntp	source	wheezy	1:4.2.6.p5+dfsg-2+deb7u4	DSA-3223-1
ntp	source	(unstable)	1:4.2.6.p5+dfsg-7

Notes

https://bugs.ntp.org/show_bug.cgi?id=2797
Patch: http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg
https://www.openwall.com/lists/oss-security/2015/04/09/5