SB2021053104 - Multiple vulnerabilities in CTS Web Trading System

Description

This security bulletin contains information about 3 vulnerabilities.

1) Improper access control (CVE-ID: CVE-2021-32541)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the connection authentication function. A remote attacker can send a large number of account messages and perform a denial of service (DoS) attack.

2) Cross-site scripting (CVE-ID: CVE-2021-32542)

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) Spoofing attack (CVE-ID: CVE-2021-32543)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data. A remote authenticated attacker can spoof page content.

Remediation

Install update from vendor's website.

References

• https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html
• https://www.twcert.org.tw/tw/cp-132-4758-82b05-1.html
• https://www.twcert.org.tw/tw/cp-132-4759-92eab-1.html