CVE-2021-20288

Name	CVE-2021-20288
Description	An authentication flaw was found in ceph in versions before 14.2.20. When the monitor handles CEPHX_GET_AUTH_SESSION_KEY requests, it doesn't sanitize other_keys, allowing key reuse. An attacker who can request a global_id can exploit the ability of any user to request a global_id previously associated with another user, as ceph does not force the reuse of old keys to generate new ones. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
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-3629-1
Debian Bugs	986974

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ceph (PTS)	bullseye	14.2.21-1	fixed
	bookworm	16.2.11+ds-2	fixed
	trixie	18.2.4+ds-9	fixed
	sid	18.2.4+ds-10	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ceph	source	buster	12.2.11+dfsg1-2.1+deb10u1		DLA-3629-1
ceph	source	(unstable)	14.2.20-1			986974

Notes

[stretch] - ceph <no-dsa> (Minor issue)
https://www.openwall.com/lists/oss-security/2021/04/14/2
https://github.com/ceph/ceph/commit/059eabcc0ada81078a898cdc25cf72bf3d506ad0
https://github.com/ceph/ceph/commit/05b3b6a305ddbb56cc53bbeadf5866db4d785f49