SB2021050413 - Multiple vulnerabilities in Redmine

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Security features bypass (CVE-ID: CVE-2021-31864)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the security features bypass issue. A remote attacker can bypass the "add_issue_notes" permission requirement.

2) Security features bypass (CVE-ID: CVE-2021-31865)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the security features bypass issue. A remote attacker can send a specially crafted request and circumvent the allowed filename extensions of uploaded attachments.

3) Information disclosure (CVE-ID: CVE-2021-31866)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker can learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.

4) Information disclosure (CVE-ID: CVE-2021-31863)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the Git repository integration. A remote attacker can gain unauthorized access to sensitive information on the system.

Remediation

Install update from vendor's website.

References

• https://www.redmine.org/projects/redmine/wiki/Security_Advisories
• https://www.redmine.org/news/131