CVE-2017-7945 : What You Need to Know

This CVE involves a vulnerability in Palo Alto Networks PAN-OS versions prior to 6.1.17, 7.x before 7.0.15, 7.1.x before 7.1.9, and 8.x before 8.0.2, specifically in the GlobalProtect external interface. The flaw allows attackers to enumerate account names and conduct brute-force attacks.

Understanding CVE-2017-7945

This CVE was published on April 29, 2017, with the vulnerability being made public on April 28, 2017.

What is CVE-2017-7945?

The vulnerability in Palo Alto Networks PAN-OS versions exposes distinct error messages for unsuccessful login attempts, indicating whether the username exists. This flaw enables malicious actors to enumerate account names and execute brute-force attacks.

The Impact of CVE-2017-7945

The vulnerability allows remote attackers to gather account information and potentially launch brute-force attacks, compromising system security.

Technical Details of CVE-2017-7945

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The GlobalProtect external interface in affected PAN-OS versions displays different error messages for failed login attempts, aiding attackers in enumerating account names and conducting brute-force attacks.

Affected Systems and Versions

Palo Alto Networks PAN-OS versions prior to 6.1.17
7.x before 7.0.15
7.1.x before 7.1.9
8.x before 8.0.2

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a series of requests to the GlobalProtect external interface, leveraging the distinct error messages to determine valid usernames and execute brute-force attacks.

Mitigation and Prevention

Protecting systems from CVE-2017-7945 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Palo Alto Networks PAN-OS to versions 6.1.17, 7.0.15, 7.1.9, or 8.0.2 to mitigate the vulnerability.
Monitor login attempts for unusual patterns that may indicate brute-force attacks.

Long-Term Security Practices

Implement multi-factor authentication to enhance login security.
Regularly review and update security configurations to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Palo Alto Networks and apply patches promptly to address known vulnerabilities.