| Name | CVE-2021-3560 |
| Description | It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. 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) |
| Debian Bugs | 989429 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| policykit-1 (PTS) | buster, buster (security) | 0.105-25+deb10u1 | fixed |
| bullseye (security), bullseye | 0.105-31+deb11u1 | fixed | |
| bookworm | 122-3 | fixed | |
| trixie | 124-1 | fixed | |
| sid | 124-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| policykit-1 | source | stretch | (not affected) | |||
| policykit-1 | source | buster | (not affected) | |||
| policykit-1 | source | (unstable) | 0.105-31 | 989429 |
[buster] - policykit-1 <not-affected> (Vulnerable code introduced later)
[stretch] - policykit-1 <not-affected> (Vulnerable code introduced later)
Issue Upstream introduced in 0.113 with https://gitlab.freedesktop.org/polkit/polkit/-/commit/bfa5036bfb93582c5a87c44b847957479d911e38
Debian backported 0.113 commits in 0.105-26
Fixed by: https://gitlab.freedesktop.org/polkit/polkit/-/commit/a04d13affe0fa53ff618e07aa8f57f4c0e3b9b81 (0.119)
https://gitlab.freedesktop.org/polkit/polkit/-/issues/140
https://bugzilla.redhat.com/show_bug.cgi?id=1961710
https://www.openwall.com/lists/oss-security/2021/06/03/1
https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/