Lenovo XClarity Controller (XCC)
CVE-2021-3956
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 “authe...
Affected versions (NVD)
| Product | Versions |
|---|---|
| xclarity_controller | < 7.22_cdi382o |
| xclarity_controller | < 2.32_psi342n |
| xclarity_controller | < 3.41_tei382m |
| xclarity_controller | < 4.83_tei3c0n |
| xclarity_controller | < 1.51_tgbt24l |
What to do
NVD gives no version range for this CVE yet, so this page cannot name an update version. Read the vendor advisory for the fixed firmware.
Vendor advisory (from the NVD record): support.lenovo.com/us/en/product_security/LEN-72074 · support.lenovo.com/us/en/product_security/LEN-72074.
Do you run it?
Paste your BMC's Redfish answers into the Redfish Inspector: it compares the firmware version with the NVD ranges, in your browser. Or scan every BMC with the free scan.
Source: NVD CVE-2021-3956. PWX for XClarity Controller
Run it on your own fleet
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