CVE-2017-7320 : What You Need to Know

MODX Revolution 2.5.4-pl and earlier versions contain a vulnerability in the setup/controllers/language.php file, allowing remote attackers to conduct Cookie-Bombing and HTTP Response Splitting attacks.

Understanding CVE-2017-7320

In MODX Revolution 2.5.4-pl and prior versions, a security flaw in the language.php file enables attackers to exploit the language parameter improperly, leading to denial of service and cross-site scripting attacks.

What is CVE-2017-7320?

The vulnerability in MODX Revolution 2.5.4-pl and earlier versions stems from inadequate constraints on the language parameter. This flaw permits attackers to execute Cookie-Bombing attacks, exhausting cookie quotas, and conduct HTTP Response Splitting attacks, resulting in cross-site scripting by providing an invalid parameter value.

The Impact of CVE-2017-7320

The exploitation of this vulnerability can have the following consequences:

Denial of service through Cookie-Bombing attacks
Cross-site scripting (XSS) via HTTP Response Splitting attacks

Technical Details of CVE-2017-7320

The technical aspects of this CVE include:

Vulnerability Description

The vulnerability arises from improper constraining of the language parameter in the setup/controllers/language.php file.

Affected Systems and Versions

Product: MODX Revolution
Versions affected: 2.5.4-pl and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the language parameter, leading to Cookie-Bombing and HTTP Response Splitting attacks.

Mitigation and Prevention

To address CVE-2017-7320, consider the following steps:

Immediate Steps to Take

Update MODX Revolution to the latest version
Implement input validation to prevent malicious parameter values

Long-Term Security Practices

Regular security audits and code reviews
Educate developers on secure coding practices

Patching and Updates

Apply security patches promptly
Monitor security advisories for MODX Revolution updates