CVE-2021-47701: openbmcs Auth Bypass — Exploit

Description

OpenBMCS 2.4 allows an attacker to escalate privileges from a read user to an admin user by manipulating permissions and exploiting a vulnerability in the update_user_permissions.php script. Attackers can submit a malicious HTTP POST request to PHP scripts in '/plugins/useradmin/' directory.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-862 Missing Authorization

Affected Products

Vendor	Product	Versions
openbmcs	openbmcs	All

References

Exploits

https://www.exploit-db.com/exploits/50669 https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5693.php

Other References

https://www.vulncheck.com/advisories/openbmcs-user-management-privilege-escalation

Frequently Asked Questions

What is CVE-2021-47701? +

OpenBMCS 2.4 allows an attacker to escalate privileges from a read user to an admin user by manipulating permissions and exploiting a vulnerability in the update_user_permissions.php script. Attackers can submit a malicious HTTP POST request to PHP scripts in '/plugins/useradmin/' directory. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2021-47701? +

CVE-2021-47701 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2021-47701? +

CVE-2021-47701 affects products from openbmcs, specifically: openbmcs. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-47701? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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