CVE-2022-23139 : Exploit Details and Defense Strategies

ZTE's ZXMP M721 product is affected by a permission and access control vulnerability, potentially granting low-authority accounts higher operating permissions on key files.

Understanding CVE-2022-23139

This CVE involves a security issue in ZTE's ZXMP M721 product related to folder permissions and access control.

What is CVE-2022-23139?

ZTE's ZXMP M721 product has a vulnerability in permission and access control. The incorrect folder permissions observed through sftp can lead to low-privilege accounts gaining higher-than-intended permissions on critical files.

The Impact of CVE-2022-23139

The vulnerability allows unauthorized users to manipulate file permissions, potentially leading to unauthorized access and misuse of sensitive data.

Technical Details of CVE-2022-23139

Here are some technical aspects of CVE-2022-23139:

Vulnerability Description

The issue arises from the inconsistency between the displayed folder permissions and the actual permissions, creating a loophole that can be exploited by threat actors.

Affected Systems and Versions

Product: ZXMP M721
Vendor: ZTE
Affected Version: V5.10.030.006

Exploitation Mechanism

By leveraging the incorrect folder permissions, attackers could elevate their privileges and access confidential files on the affected system.

Mitigation and Prevention

To address CVE-2022-23139, consider the following security measures:

Immediate Steps to Take

Review and update folder permissions to ensure consistency and accuracy.
Monitor file access and permissions changes for any suspicious activity.

Long-Term Security Practices

Implement regular security audits to detect and mitigate vulnerabilities promptly.
Educate users on proper file permission management practices to prevent exploitation.

Patching and Updates

Stay informed about security advisories from ZTE and apply patches or updates provided to fix the vulnerability.