CVE-2021-3956
Last modified
CVE-2021-3956 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.72% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lenovo | Xclarity Controller | < 7.22_cdi382o |
| Lenovo | Xclarity Controller | < 2.32_psi342n |
| Lenovo | Xclarity Controller | < 3.41_tei382m |
| Lenovo | Xclarity Controller | < 4.83_tei3c0n |
| Lenovo | Xclarity Controller | < 1.51_tgbt24l |
References
- https://support.lenovo.com/us/en/product_security/LEN-72074Vendor Advisory
- https://support.lenovo.com/us/en/product_security/LEN-72074Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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