Zero-day vulnerability in Crypto Application Server (CAS)

Improper access control

Vulnerability details

Advisory: SB2023032105 - Remote code execution in General Bytes Crypto Application Server (CAS)

Vulnerable component: Crypto Application Server (CAS)

CVE-ID:

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:H/RL:O/RC:C

CWE-ID: CWE-284 - Improper Access Control

Description:

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper access restrictions in the master service interface on port 7741/TCP. A remote attacker can send a specially crafted request to the affected server and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://generalbytes.atlassian.net/wiki/spaces/ESD/pages/2885222430/Security+Incident+March+17-18th+2023