CVE-2020-14387

Name	CVE-2020-14387
Description	A flaw was found in rsync in versions since 3.2.0pre1. Rsync improperly validates certificate with host mismatch vulnerability. A remote, unauthenticated attacker could exploit the flaw by performing a man-in-the-middle attack using a valid certificate for another hostname which could compromise confidentiality and integrity of data transmitted using rsync-ssl. The highest threat from this vulnerability is to data confidentiality and integrity. This flaw affects rsync versions before 3.2.4.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	969530

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rsync (PTS)	buster	3.1.3-6	fixed
	bullseye	3.2.3-4+deb11u1	fixed
	bookworm, sid	3.2.4-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
rsync	source	stretch	(not affected)
rsync	source	buster	(not affected)
rsync	source	(unstable)	3.2.3-3	969530

Notes

[buster] - rsync <not-affected> (Vulnerable code introduced later)
[stretch] - rsync <not-affected> (Vulnerable code introduced later)
Introduced by: https://git.samba.org/?p=rsync.git;a=commitdiff;h=2a87d78f693f10fe5ad13af0bb9311bd3714077d (v3.2.0pre1)
Fixed by: https://git.samba.org/?p=rsync.git;a=commitdiff;h=c3f7414c450faaf6a8281cc4a4403529aeb7d859
https://bugzilla.redhat.com/show_bug.cgi?id=1875549