SB2020070134 - Multiple vulnerabilities in F5 BIG-IP products

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Cross-site request forgery (CVE-ID: CVE-2020-5904)

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 in the Traffic Management User Interface (TMUI). 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.

2) Cross-site scripting (CVE-ID: CVE-2020-5903)

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 an undisclosed page of the BIG-IP Configuration utility. 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) Incorrect default permissions (CVE-ID: CVE-2020-5906)

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for the "scp.blacklist" files. A remote user can read and overwrite blacklisted files via SCP.

Remediation

Install update from vendor's website.

References

• https://support.f5.com/csp/article/K31301245
• https://www.kb.cert.org/vuls/id/290915
• https://support.f5.com/csp/article/K43638305
• https://support.f5.com/csp/article/K82518062