VIR Vulnerability Intelligence Relay

CVE-2021-4034

high KEV
Published 2022-06-27 · Modified 2022-06-27
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
—
CVSS v4 NEW
—
not yet in upstream
VIR risk
10.0

Description

The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability that allows for privilege escalation with administrative rights.

CISA KEV

Vendor
Red Hat
Product
Polkit
Due date
2022-07-18

Predictions

Exploit likelihood
99%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-50689 local linux
Lance Biggerstaff · 2022-01-27

PolicyKit-1 0.105-31 - Privilege Escalation

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_linux/local/cve_2021_4034_pwnkit_lpe_pkexec rank 600
Local Privilege Escalation in polkits pkexec
Source fetch failed: fetch_error — view the original via the link above.

OS impact
suse SUSE Affected 1 release
VersionStatusFixed in
— Affected —
arch Arch Fixed 1 release
VersionStatusFixed in
— Fixed 0.120-5
debian Debian Fixed 5 releases
VersionStatusFixed in
trixie Fixed 0.105-31.1
sid Fixed 0.105-31.1
forky Fixed 0.105-31.1
bullseye Fixed 0.105-31+deb11u1
bookworm Fixed 0.105-31.1
redhat Red Hat Fixed 1 release
VersionStatusFixed in
8 Fixed —
rockylinux Rocky Linux Fixed 1 release
VersionStatusFixed in
8 Fixed —

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.