CVE-2021-31607

Name	CVE-2021-31607
Description	In SaltStack Salt 2016.9 through 3002.6, a command injection vulnerability exists in the snapper module that allows for local privilege escalation on a minion. The attack requires that a file is created with a pathname that is backed up by snapper, and that the master calls the snapper.diff function (which executes popen unsafely).
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-2815-1
Debian Bugs	987496

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
salt	source	stretch	2016.11.2+ds-1+deb9u7	DLA-2815-1
salt	source	buster	2018.3.4+dfsg1-6+deb10u3
salt	source	(unstable)	3002.6+dfsg1-2		987496

Notes

https://sec.stealthcopter.com/saltstack-snapper-minion-privledge-escaltion/
Introduced by: https://gitlab.com/saltstack/open/salt/-/commit/1343078d03613e33eec9e5ec5095d2e0b0aa2e59 (v2016.9)
Combined fix and regression fix: https://salsa.debian.org/salt-team/salt/-/commit/71f7f30851f9609bfda5a1b0f5b115d2743372cd