A vulnerability, which was classified as critical, has been found in CleanMyMac X 4.20. Affected by this issue is an unknown code of the component Helper Service. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An exploitable privilege escalation vulnerability exists in the helper service CleanMyMac X, version 4.20, due to improper updating. The application failed to remove the vulnerable components upon upgrading to the latest version, leaving the user open to attack. A user with local access can use this vulnerability to modify the file system as root. An attacker would need local access to the machine for a successful exploit.

The bug was discovered 03/11/2019. The weakness was released 03/21/2019. This vulnerability is handled as CVE-2019-5011 since 01/04/2019. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 10 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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• CleanMyMac X

Version

• 4.20

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CPE 2.2info

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