A vulnerability, which was classified as critical, has been found in GOG Galaxy 1.2.47 on MacOS. This issue affects an unknown code of the component Helper Tool. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An exploitable local privilege escalation vulnerability exists in the privileged helper tool of GOG Galaxy's Games, version 1.2.47 for macOS. An attacker can globally adjust folder permissions leading to execution of arbitrary code with elevated privileges.

The bug was discovered 03/26/2019. The weakness was shared 04/01/2019 (Website). The advisory is shared at talosintelligence.com. The identification of this vulnerability is CVE-2018-4050 since 01/02/2018. An attack has to be approached locally. A simple authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• GOG

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• Galaxy

Version

• 1.2.47

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