CVE-2022-31252 : Vulnerability Insights and Analysis

A detailed overview of an Incorrect Authorization vulnerability in chkstat of SUSE Linux Enterprise Server and openSUSE Leap versions.

Understanding CVE-2022-31252

This CVE refers to an Incorrect Authorization vulnerability in chkstat of SUSE Linux Enterprise Server 12-SP5 and various openSUSE Leap versions.

What is CVE-2022-31252?

CVE-2022-31252 highlights a flaw in chkstat that did not account for group-writable path components in certain distributions, enabling local attackers to influence path resolution to a privileged binary.

The Impact of CVE-2022-31252

The vulnerability could allow local attackers with access to a group that can write to a specific location included in the path to impact path resolution, potentially leading to unauthorized access or privilege escalation.

Technical Details of CVE-2022-31252

A deeper look into the vulnerability in chkstat:

Vulnerability Description

The vulnerability arises from chkstat not considering group-writable path components, creating a pathway for local attackers to exploit the privilege escalation.

Affected Systems and Versions

SUSE Linux Enterprise Server 12-SP5 permissions versions prior to 20170707.
openSUSE Leap 15.3 permissions versions prior to 20200127.
openSUSE Leap 15.4 permissions versions prior to 20201225.
openSUSE Leap Micro 5.2 permissions versions prior to 20181225.

Exploitation Mechanism

By leveraging group access to write to certain paths included in the chkstat resolution flow, attackers can manipulate path access to influence binary execution.

Mitigation and Prevention

Tips to address and mitigate the CVE-2022-31252 risk:

Immediate Steps to Take

Update permissions versions of affected systems to the specified minimum versions to patch the vulnerability.
Monitor and restrict group access that can write to critical system paths.

Long-Term Security Practices

Implement a least privilege model to limit access rights across the system.
Regularly audit and review file permissions to prevent unauthorized changes.

Patching and Updates

Stay informed about security patches and updates for SUSE Linux Enterprise Server and openSUSE Leap to address vulnerabilities promptly.