Bug 2316488 (CVE-2024-47191)

Summary:	CVE-2024-47191 oath-toolkit: Local root exploit in a PAM module
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	amctagga, aoconnor, bniver, flucifre, gmeno, mbenjamin, mhackett, security-response-team, sostapov, vereddy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A vulnerability was found in a PAM module, the oath-toolkit. The module gained a feature that allowed placing the OTP state file, called the usersfile, in the home directory of the to-be-authenticated user. The PAM module performed unsafe file operations in the users' home directories. Since PAM stacks typically run as root, this flaw allows a malicious user to jeopardize an environment.	Story Points:	---
Clone Of:		Environment:
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2316489, 2316494, 2316490, 2316491, 2316492, 2316493, 2348752
Bug Blocks:

Description OSIDB Bzimport 2024-10-04 15:39:13 UTC

oath-toolkit[1] contains libraries and utilities for managing one-time password
(OTP) authentication e.g. as a second factor to password authentication. A couple of years ago, the module gained a feature which allows to place the OTP state file (called usersfile) in the home directory of the to-be-authenticated user. Fabian noticed that the PAM module performs unsafe file operations in users' home directories. Since PAM stacks typically run as root, this can easily cause security issues.

The feature in question has been introduced in oath-toolkit version 2.6.7 (via
commit 60d9902b5c [2]). The following report is based on the most recent
oath-toolkit release tag for version 2.6.11.