CVE-2020-36894: i-media server Missing Auth — Exploit

Description

Eibiz i-Media Server Digital Signage 3.8.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to create admin users through AMF-encoded object manipulation. Attackers can send crafted serialized objects to the /messagebroker/amf endpoint to create administrative users without authentication, bypassing security controls.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
eibiz	i-media_server_digital_signage	All

References

Exploits

https://www.exploit-db.com/exploits/48763 https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5586.php https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5586.php

Other References

http://www.eibiz.co.th https://www.vulncheck.com/advisories/eibiz-i-media-server-digital-signage-unauthenticated-user-creation-vulnerability

Frequently Asked Questions

What is CVE-2020-36894? +

Eibiz i-Media Server Digital Signage 3.8.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to create admin users through AMF-encoded object manipulation. Attackers can send crafted serialized objects to the /messagebroker/amf endpoint to create administrative users without authentication, bypassing security controls. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-36894? +

CVE-2020-36894 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2020-36894? +

CVE-2020-36894 affects products from eibiz, specifically: i-media_server_digital_signage. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2020-36894? +

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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CVE-2020-36894