Vulnerability · Published Feb 21, 2022 · Assigned by redhat
CVE-2021-4115
Medium 5.5
In plain English
A medium-severity uncontrolled resource consumption in polkitd. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.5%top 55.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | polkit | 0.115-13.el8_5.2 | ALSA-2022:1546 |
| AlmaLinux:8 | polkit-devel | 0.115-13.el8_5.2 | ALSA-2022:1546 |
| AlmaLinux:8 | polkit-docs | 0.115-13.el8_5.2 | ALSA-2022:1546 |
| AlmaLinux:8 | polkit-libs | 0.115-13.el8_5.2 | ALSA-2022:1546 |
| Debian:12 | policykit-1 | 0.105-32 | DEBIAN-CVE-2021-4115 |
| Debian:13 | policykit-1 | 0.105-32 | DEBIAN-CVE-2021-4115 |
| Debian:14 | policykit-1 | 0.105-32 | DEBIAN-CVE-2021-4115 |
| Rocky Linux:8 | polkit | 0:0.115-13.el8_5.2 | RLSA-2022:1546 |
Affected products (as reported)
Weakness: CWE-400
References
- https://access.redhat.com/security/cve/cve-2021-4115
- https://gitlab.freedesktop.org/polkit/polkit/-/issues/141
- https://gitlab.com/redhat/centos-stream/rpms/polkit/-/merge_requests/6/diffs?commit_id=bf900df04dc390d389e59aa10942b0f2b15c531e
- FEDORA-2022-5e6d5fe680 vendor-advisory
- https://www.oracle.com/security-alerts/cpujul2022.html
- http://packetstormsecurity.com/files/172849/polkit-File-Descriptor-Exhaustion.html