SB2020051413 - Multiple vulnerabilities in Six Apart Movable Type

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Improper Neutralization of Special Elements in Output Used by a Downstream Component (CVE-ID: CVE-2020-5574)

The vulnerability allows a remote attacker to perform cache poisoning attack.

The vulnerability exists due to improper input validation of HTML code. A remote attacker can send a specially crated request and inject arbitrary HTML attribute value.

2) Cross-site scripting (CVE-ID: CVE-2020-5575)

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. 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.

3) Cross-site request forgery (CVE-ID: CVE-2020-5576)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

4) Arbitrary file upload (CVE-ID: CVE-2020-5577)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload. A remote authenticated attacker can upload a malicious file and execute it on the server.

Remediation

Install update from vendor's website.

References

• https://jvn.jp/en/jp/JVN28806943/index.html
• https://movabletype.org/news/2020/05/mt-730-660-6312-released.html