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).
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-31607
- https://lists.debian.org/debian-lts-announce/2021/11/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6BUWUF5VTENNP2ZYZBVFKPSUHLKLUBD5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ACVT7M4YLZRLWWQ6SGRK3C6TOF4FXOXT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LDKMAJXYFHM4USVX3H5V2GCCBGASWUSM/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MBAHHSGZLEJRCG4DX6J4RBWJAAWH55RQ/
- https://sec.stealthcopter.com/saltstack-snapper-minion-privledge-escaltion/
- https://www.debian.org/security/2021/dsa-5011
- https://github.com/pypa/advisory-database/tree/main/vulns/salt/PYSEC-2021-56.yaml
- https://github.com/advisories/GHSA-hcjf-rp5h-g5h3