CVE-2021-44143

Name	CVE-2021-44143
Description	A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
Debian Bugs	999804

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
isync (PTS)	stretch	1.2.1-2	fixed
	buster	1.3.0-2.2~deb10u1	fixed
	bullseye	1.3.0-2.2+deb11u1	fixed
	bookworm, sid	1.4.4-3	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
isync	source	stretch	(not affected)
isync	source	buster	(not affected)
isync	source	bullseye	(not affected)
isync	source	(unstable)	1.4.4-1	999804

Notes

[bullseye] - isync <not-affected> (Vulnerable code introduced later)
[buster] - isync <not-affected> (Vulnerable code introduced later)
[stretch] - isync <not-affected> (Vulnerable code introduced later)
https://www.openwall.com/lists/oss-security/2021/12/03/2