SB2020072203 - Multiple vulnerabilities in SilverStripe Framework

Description

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2020-9311)

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:L/UI:P/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 in user profile information. A remote authenticated 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) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2019-19326)

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

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

The vulnerability allows a remote attacker to perform cache poisoning attack.

The vulnerability exists due to improper input validation in the "X-Original-Url" and "X-HTTP-Method-Override" headers. A remote attacker can send a specially crated HTTP request and poison the cache.

Remediation

Install update from vendor's website.

References

• https://www.silverstripe.org/download/security-releases/CVE-2020-9311
• https://www.silverstripe.org/download/security-releases/CVE-2019-19326