CVE-2021-4115
Published: 14 February 2022
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
Notes
| Author | Note |
|---|---|
| mdeslaur | Introduced by backported patch in focal+: PolkitSystemBusName-Retrieve-both-pid-and-uid.patch |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
policykit-1 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Released
(0.105-26ubuntu1.3)
|
|
| impish |
Released
(0.105-31ubuntu0.2)
|
|
| jammy |
Not vulnerable
(0.105-32)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
Patches: upstream: https://github.com/freedesktop/polkit/commit/41cb093f554da8772362654a128a84dd8a5542a7 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |