SB2020082521 - Multiple vulnerabilities in Joomla!

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2020-24599)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in mod_latestactions core component. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

2) Open redirect (CVE-ID: CVE-2020-24598)

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data within the com_content vote feature. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

3) Path traversal (CVE-ID: CVE-2020-24597)

The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in om_media. A remote authenticated user can send a specially crafted HTTP request and read arbitrary files on the system.

Remediation

Install update from vendor's website.

References

• https://developer.joomla.org/security-centre/824-20200801-core-xss-in-mod-latestactions.html
• https://developer.joomla.org/security-centre/825-20200802-core-open-redirect-in-com-content-vote-feature.html
• https://developer.joomla.org/security-centre/827-20200803-core-directory-traversal-in-com-media.html