CVE-2020-10560 : What You Need to Know

Open Source Social Network (OSSN) through 5.3 is affected by a vulnerability that allows an attacker to read any file with webserver permissions. The issue arises from a weak cryptographic rand() function in user-controlled file paths, requiring a brute-force attack on the SiteKey.

Understanding CVE-2020-10560

This CVE identifies a security flaw in OSSN that can be exploited to compromise the system.

What is CVE-2020-10560?

The vulnerability in OSSN through version 5.3 enables unauthorized file access through a user-controlled file path with weak cryptographic protection.

The Impact of CVE-2020-10560

Exploiting this vulnerability can lead to unauthorized access to sensitive files on the webserver, potentially resulting in a complete system compromise.

Technical Details of CVE-2020-10560

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw allows an attacker to read any file on the webserver by manipulating a user-controlled file path with weak cryptographic protection.

Affected Systems and Versions

Product: Open Source Social Network (OSSN)
Versions: Up to and including 5.3

Exploitation Mechanism

Attackers need to conduct a brute-force attack against the SiteKey to insert into a crafted URL for components/OssnComments/ossn_com.php and/or libraries/ossn.lib.upgrade.php.

Mitigation and Prevention

Protecting systems from CVE-2020-10560 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update OSSN to the latest version to patch the vulnerability.
Monitor and restrict access to sensitive files on the webserver.

Long-Term Security Practices

Implement strong cryptographic functions for file access control.
Regularly audit and review file permissions and access controls.

Patching and Updates

Apply security patches and updates provided by OSSN to address the vulnerability.