SB2021033112 - Multiple vulnerabilities in Jenkins Team Foundation Server plugin

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-21636)

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to the affected plugin does not perform a permission check in an HTTP endpoint. A remote authenticated attacker can enumerate credentials IDs of credentials stored in Jenkins.

2) Cross-site request forgery (CVE-ID: CVE-2021-21638)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-21637)

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to the affected plugin does not perform a permission check in an HTTP endpoint. A remote authenticated attacker can connect to an attacker-specified URL and capture credentials stored in Jenkins.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• http://www.openwall.com/lists/oss-security/2021/03/30/1
• https://www.jenkins.io/security/advisory/2021-03-30/#SECURITY-2283%20(1)
• https://www.jenkins.io/security/advisory/2021-03-30/#SECURITY-2283%20(2)