CVE-2025-1390

pam_cap: Fix potential configuration parsing error

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

The PAM module pam_cap.so of libcap configuration supports group names starting with “@”, during actual parsing, configurations not starting with “@” are incorrectly recognized as group names. This may result in nonintended users being granted an inherited capability set, potentially leading to security risks. Attackers can exploit this vulnerability to achieve local privilege escalation on systems where /etc/security/capability.conf is used to configure user inherited privileges by constructing specific usernames.

Tianjia Zhang discovered the libcap2 PAM module pam_cap incorrectly handled parsing group names in the configuration file. This could result in certain users being granted capabilities, contrary to expectations.

*Credits: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Complete

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2025-02-17 CVE Reserved
2025-02-18 CVE Published
2025-02-18 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-284: Improper Access Control

CAPEC

CAPEC-19: Embedding Scripts within Scripts

References (1)

URL	Tag	Source
https://bugzilla.openanolis.cn/show_bug.cgi?id=18804

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openanolis Search vendor "Openanolis"		Anolis Os Search vendor "Openanolis" for product "Anolis Os"				*		-		Affected