Home/CVE/There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor
CVE

CVE-2021-4115

There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor

There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor exhaustion. The highest threat from this vulnerability is to availability. NOTE: Polkit process outage duration is tied to the failing process being reaped and a new one being spawned.

MEDIUM · CVSS 5.5 EPSS 0.00091
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

6
polkit project polkitall versions
redhat enterprise linuxall versions
fedoraproject fedoraall versions
canonical ubuntu linuxall versions
debian linuxall versions
oracle zfs storage appliance kitall versions
⚠

Public Exploits & PoCs

2
pocpacketstormsecurity.com · polkit-File-Descriptor-Exhaustion.htmlpacketstormsecurity.com
pocgitlab.freedesktop.org · issues/141gitlab.freedesktop.org
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Feb 2022 · 10:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

8
suse-csafopenSUSE-SU-2024:11868-1
suse-csafSUSE-SU-2022:0525-2
usnUSN-5304-1
suse-csafopenSUSE-SU-2022:0525-1
suse-csafSUSE-SU-2022:0524-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/cve-2021-4115Third Party Advisory
https://gitlab.com/redhat/centos-stream/rpms/polkit/-/merge_requests/6/diffs?commit_id=bf900df04dc390d389e59aa10942b0f2b15c531ePatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VGKWCBS6IDZYYDYM2WIWJM5BL7QQTWPF/
https://www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory
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