Description (CNA)
Vulnerability in the access control system of the GAMS licensing system that allows unlimited valid licenses to be generated, bypassing any usage restrictions. The validator uses an insecure checksum algorithm; knowing this algorithm and the format of the license lines, an attacker can recalculate the checksum and generate a valid license to grant themselves full privileges without credentials or access to the source code, allowing them unrestricted access to GAMS's mathematical models and commercial solvers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| AMS Development Corp. / GAMS | affected 0 through 49.6.0 |
CWE
CWE-639
References
- https://www.incibe.es/en/incibe-cert/notices/aviso/authorization-bypass-gams-gams-development-corp
- https://www.gams.com/latest/docs/RN_51.html
ADP enrichment
No English description supplied.
No references supplied.