CVE-2021-3956
4.3 · MEDIUMOverview
CVE-2021-3956 is a medium-severity vulnerability affecting lenovo xclarity_controller. It was published on May 18, 2022 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
A read-only authentication bypass vulnerability was reported in the Third Quarter 2021 release of Lenovo XClarity Controller (XCC) firmware affecting XCC devices configured in LDAP Authentication Only Mode and using an LDAP server that supports “unauthenticated bind”, such as Microsoft Active Directory. An unauthenticated user can gain read-only access to XCC in such a configuration, thereby allowing the XCC device configuration to be viewed but not changed. XCC devices configured to use local authentication, LDAP Authentication + Authorization Mode, or LDAP servers that support only “authenticated bind” and/or “anonymous bind” are not affected.
Remediation
Check the references section for vendor advisories and patches from lenovo. Update xclarity_controller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| lenovo | xclarity_controller | >= 0, < 7.22_cdi382o | Affected |
Frequently Asked Questions
What is CVE-2021-3956?
CVE-2021-3956 is a medium-severity vulnerability affecting lenovo xclarity_controller. It was published on May 18, 2022 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
How severe is CVE-2021-3956?
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-3956?
Check the references section for vendor advisories and patches from lenovo. Update xclarity_controller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-3956?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3956 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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