CVE-2021-23727

Name	CVE-2021-23727
Description	This affects the package celery before 5.2.2. It by default trusts the messages and metadata stored in backends (result stores). When reading task metadata from the backend, the data is deserialized. Given that an attacker can gain access to, or somehow manipulate the metadata within a celery backend, they could trigger a stored command injection vulnerability and potentially gain further access to the system.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
celery (PTS)	buster	4.2.1-3	fixed
	bullseye	5.0.0-3	vulnerable
	bookworm	5.2.6-5	fixed
	sid	5.3.6-2	fixed

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

Package	Type	Release	Fixed Version
celery	source	stretch	(not affected)
celery	source	buster	(not affected)
celery	source	(unstable)	5.2.3-1

Notes

[bullseye] - celery <no-dsa> (Minor issue)
[buster] - celery <not-affected> (Vulnerable code not present)
[stretch] - celery <not-affected> (Vulnerable code introduced later)
https://github.com/celery/celery/commit/5c3f1559df16c32fb8d82918b4497f688d42ad0a (v5.2.3)
Introduced by: https://github.com/celery/celery/commit/d20b8a5d469c80f48468e251cbe6451c798d1c29 (4.4.0rc1)