SB2019091304 - Multiple vulnerabilities in CODESYS products

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2019-13548)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the CODESYS V3 web server. A remote unauthenticated attacker can send a specially crafted HTTP or HTTPS request, trigger stack-based buffer overflow and cause a denial-of-service condition or execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Path traversal (CVE-ID: CVE-2019-13532)

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

The vulnerability exists due to input validation error when processing directory traversal sequences in the CODESYS V3 web server. A remote attacker can send a specially crafted HTTP or HTTPS request and read arbitrary files outside the restricted working directory of the controller.

3) Cross-site scripting (CVE-ID: CVE-2019-13538)

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 the CODESYS V3 Library Manager. 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.

4) NULL pointer dereference (CVE-ID: CVE-2019-13542)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when processing requests. A remote authenticated attacker can send a specially crafted request from a trusted OPC UA client and perform a denial of service (DoS) attack.

5) Resource Management Errors (CVE-ID: CVE-2019-9009)

Remediation

Install update from vendor's website.

References

• https://ics-cert.us-cert.gov/advisories/icsa-19-255-01
• https://ics-cert.us-cert.gov/advisories/icsa-19-255-02
• https://ics-cert.us-cert.gov/advisories/icsa-19-255-04
• https://ics-cert.us-cert.gov/advisories/icsa-19-255-05