SB2023090810 - Multiple vulnerabilities in Phoenix Contact TC ROUTER and TC CLOUD CLIENT

Description

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2023-3526)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

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 within the license viewer page. 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) XML Entity Expansion (CVE-ID: CVE-2023-3569)

CWE-ID: CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to perform a denial o service (DoS) attack.

The vulnerability exists due to improper restrictions on XML entities. A remote administrator can upload a specially crafted XML file and cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://cert.vde.com/en/advisories/VDE-2023-017
• http://seclists.org/fulldisclosure/2023/Aug/12
• http://packetstormsecurity.com/files/174152/Phoenix-Contact-TC-Cloud-TC-Router-2.x-XSS-Memory-Consumption.html