| Package | Affected versions | Patched versions |
|---|---|---|
| gams | ≥ 49.1.0, < 49.7.0< 48.7.0 | 49.7.048.7.0 |
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.
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