CVE-2009-0021

Name	CVE-2009-0021
Description	NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-1702-1

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	1:4.2.8p12+dfsg-4	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	Urgency	Origin	Debian Bugs
ntp	source	etch	1:4.2.2.p4+dfsg-2etch1		DSA-1702-1
ntp	source	(unstable)	1:4.2.4p4+dfsg-8