SB2023040490 - Multiple vulnerabilities in Sophos Web Appliance

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) OS Command Injection (CVE-ID: CVE-2023-1671)

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

The vulnerability exists due to improper input validation in the warn-proceed handler. A remote unauthenticated attacker can send specially crafted request to the appliance and execute arbitrary OS commands on the target system.

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

2) OS Command Injection (CVE-ID: CVE-2022-4934)

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the exception wizard. A remote authenticated administrator can send specially crafted request to the appliance and execute arbitrary OS commands on the target system.

3) Reflected cross-site scripting (CVE-ID: CVE-2020-36692)

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 report scheduler. 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.

Remediation

Install update from vendor's website.

References

• https://www.sophos.com/en-us/security-advisories/sophos-sa-20230404-swa-rce
• https://wsa.sophos.com/docs/ws1000/ws1000/concepts/ReleaseNotes_4.3.10.4.html