CVE-2021-43293 : Security Advisory and Response

Sonatype Nexus Repository Manager 3.x before 3.36.0 allows a remote authenticated attacker to potentially perform network enumeration via Server Side Request Forgery (SSRF).

Understanding CVE-2021-43293

Sonatype Nexus Repository Manager 3.x before 3.36.0 is vulnerable to Server Side Request Forgery (SSRF), which can be exploited by a remote authenticated attacker.

What is CVE-2021-43293?

This CVE refers to the vulnerability in Sonatype Nexus Repository Manager 3.x versions before 3.36.0 that enables a remote authenticated attacker to conduct network enumeration through Server Side Request Forgery (SSRF).

The Impact of CVE-2021-43293

The vulnerability can lead to unauthorized network enumeration activities by an attacker with authenticated access, potentially exposing sensitive network information.

Technical Details of CVE-2021-43293

The technical aspects of the CVE include:

Vulnerability Description

Server Side Request Forgery (SSRF) vulnerability in Sonatype Nexus Repository Manager 3.x before 3.36.0

Affected Systems and Versions

Product: Sonatype Nexus Repository Manager 3.x
Vendor: N/A
Versions: All versions before 3.36.0

Exploitation Mechanism

A remote authenticated attacker can leverage the SSRF vulnerability to perform network enumeration.

Mitigation and Prevention

To address CVE-2021-43293, follow these steps:

Immediate Steps to Take

Upgrade Sonatype Nexus Repository Manager to version 3.36.0 or later.
Monitor network activities for suspicious behavior.

Long-Term Security Practices

Implement strict access controls for authenticated users.
Regularly update and patch software to prevent security vulnerabilities.
Conduct security training for employees to raise awareness.
Employ network monitoring tools to detect and respond to unauthorized activities.
Disable unnecessary services to reduce the attack surface.

Patching and Updates

Ensure timely installation of software updates and security patches to safeguard against known vulnerabilities.