CVE-2021-3047 : Vulnerability Insights and Analysis

A cryptographically weak pseudo-random number generator (PRNG) used during authentication to the Palo Alto Networks PAN-OS web interface allows an authenticated attacker to impersonate another administrator's session. This affects PAN-OS 8.1, 9.0, 9.1, and 10.0 versions.

Understanding CVE-2021-3047

This CVE addresses the use of weak cryptography in web interface authentication within PAN-OS.

What is CVE-2021-3047?

A weak PRNG in PAN-OS web interface authentication enables an attacker to impersonate other administrators. The affected versions include PAN-OS 8.1, 9.0, 9.1, and 10.0.

The Impact of CVE-2021-3047

The vulnerability allows authenticated attackers to manipulate sessions of other administrators on affected PAN-OS versions.

Technical Details of CVE-2021-3047

This section provides detailed technical information regarding the vulnerability.

Vulnerability Description

The use of a weak PRNG in PAN-OS web interface authentication poses a significant security risk, enabling session impersonation.

Affected Systems and Versions

PAN-OS versions earlier than 8.1.19, 9.0.14, 9.1.10, and 10.0.4 are impacted, while 10.1 versions remain unaffected.

Exploitation Mechanism

Authenticated attackers with access to their authentication secrets on the PAN-OS appliance can exploit this issue to impersonate other administrators.

Mitigation and Prevention

To address CVE-2021-3047, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Upgrade affected PAN-OS versions to 8.1.19, 9.0.14, 9.1.10, 10.0.4, or later releases to mitigate the vulnerability.

Long-Term Security Practices

Regularly update PAN-OS versions and follow best security practices to prevent similar vulnerabilities in the future.

Patching and Updates

Ensure timely application of patches and upgrades provided by Palo Alto Networks to address security concerns.