CVE-2021-3956
Lenovo XClarity Controller LDAP Read-Only Authentication Bypass
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.
INFO
Published Date :
May 18, 2022, 4:15 p.m.
Last Modified :
June 6, 2022, 6:28 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3956.
| URL | Resource |
|---|---|
| https://support.lenovo.com/us/en/product_security/LEN-72074 | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-3956 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3956 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 06, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://support.lenovo.com/us/en/product_security/LEN-72074 No Types Assigned https://support.lenovo.com/us/en/product_security/LEN-72074 Vendor Advisory Added CWE NIST CWE-863 Added CPE Configuration AND OR *cpe:2.3:a:lenovo:xclarity_controller:*:*:*:*:*:*:*:* versions up to (excluding) 7.22_cdi382o OR cpe:2.3:h:lenovo:thinkagile_hx1320:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx1321:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx1520-r:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx1521-r:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx2320-e:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx2321:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx3320:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx3321:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx3375:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx3376:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx3520-g:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx3521-g:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx5520:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx5520-c:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx5521:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx5521-c:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx7520:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx7521:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_vx2320:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_vx3320:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_vx3520-g:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_vx5520:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_vx7320_n:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_vx7520:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_vx7520_n:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkstation_p920:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr530:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr550:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr570:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr590:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr630:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr645:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr650:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr665:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_st550:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:lenovo:xclarity_controller:*:*:*:*:*:*:*:* versions up to (excluding) 2.32_psi342n OR cpe:2.3:h:lenovo:thinkagile_hx7820:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinkagile_hx7821:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr950:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:lenovo:xclarity_controller:*:*:*:*:*:*:*:* versions up to (excluding) 3.41_tei382m OR cpe:2.3:h:lenovo:thinkagile_mx1021:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_se350:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:lenovo:xclarity_controller:*:*:*:*:*:*:*:* versions up to (excluding) 4.83_tei3c0n OR cpe:2.3:h:lenovo:thinksystem_sd650:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sn550:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sn850:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr850:-:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr860:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:lenovo:xclarity_controller:*:*:*:*:*:*:*:* versions up to (excluding) 1.51_tgbt24l OR cpe:2.3:h:lenovo:thinksystem_sr850:2.0:*:*:*:*:*:*:* cpe:2.3:h:lenovo:thinksystem_sr860:2.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 18, 2022
Action Type Old Value New Value Changed 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 bindâ€?, 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 bindâ€? and/or “anonymous bindâ€? are not affected. 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.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3956 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3956
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.07 }} 0.01%
score
0.30814
percentile