Vulnerability · Published Feb 25, 2022 · Assigned by Google

CVE-2022-25327Local Denial of Service in fscrypt PAM module

Medium 5.5

In plain English

A medium-severity security flaw in fscrypt from Google LLC. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.1%top 98.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The PAM module for fscrypt doesn't adequately validate fscrypt metadata files, allowing users to create malicious metadata files that prevent other users from logging in. A local user can cause a denial of service by creating a fscrypt metadata file that prevents other users from logging into the system. We recommend upgrading to version 0.3.3 or above

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	fscrypt	0.3.3-1	DEBIAN-CVE-2022-25327
Debian:13	fscrypt	0.3.3-1	DEBIAN-CVE-2022-25327
Debian:14	fscrypt	0.3.3-1	DEBIAN-CVE-2022-25327
Go	github.com/google/fscrypt	0.3.3	GHSA-8vwm-8vj8-rqjf
Go	github.com/google/fscrypt	0.3.3	GHSA-p93v-m2r2-4387
Go	github.com/google/fscrypt	0.3.3	GO-2022-0340

Affected products (as reported)

Vendor	Product	Versions
Google LLC	fscrypt	unspecified – through 0.3.2

Weakness: CWE-255 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/google/fscrypt/pull/346 x_refsource_MISC