CVE-2023-6917

Name	CVE-2023-6917
Description	A vulnerability has been identified in the Performance Co-Pilot (PCP) package, stemming from the mixed privilege levels utilized by systemd services associated with PCP. While certain services operate within the confines of limited PCP user/group privileges, others are granted full root privileges. This disparity in privilege levels poses a risk when privileged root processes interact with directories or directory trees owned by unprivileged PCP users. Specifically, this vulnerability may lead to the compromise of PCP user isolation and facilitate local PCP-to-root exploits, particularly through symlink attacks. These vulnerabilities underscore the importance of maintaining robust privilege separation mechanisms within PCP to mitigate the potential for unauthorized privilege escalation.
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
pcp (PTS)	buster	4.3.2+really4.3.1-0.1	vulnerable
	bullseye	5.2.6-1	vulnerable
	bookworm	6.0.3-1.1	vulnerable
	trixie	6.2.0-1	fixed
	sid	6.2.0-1.1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pcp	source	(unstable)	6.2.0-1

Notes

[bookworm] - pcp <no-dsa> (Minor issue)
[bullseye] - pcp <no-dsa> (Minor issue)
[buster] - pcp <no-dsa> (Minor issue)
https://www.openwall.com/lists/oss-security/2024/02/28/1
https://github.com/performancecopilot/pcp/pull/1873