Valve Steam Client up to 2019-08-07 on Windows Registry Permission input validation ⚔ [Disputed]

Summaryinfo

A vulnerability was found in Valve Steam Client up to 2019-08-07 on Windows. It has been rated as critical. This impacts an unknown function of the component Registry Permission. The manipulation leads to input validation. This vulnerability is listed as CVE-2019-14743. The attack must be carried out locally. There is no available exploit. It is still unclear if this vulnerability genuinely exists.

Detailsinfo

A vulnerability was found in Valve Steam Client up to 2019-08-07 on Windows. It has been rated as critical. This issue affects an unknown function of the component Registry Permission. 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. The summary by CVE is:

** DISPUTED ** In Valve Steam Client for Windows through 2019-08-07, HKLM\SOFTWARE\Wow6432Node\Valve\Steam has explicit "Full control" for the Users group, which allows local users to gain NT AUTHORITY\SYSTEM access. NOTE: the vendor disputes the significance of this finding; the discoverer was reportedly told that the Steam threat model excludes "Attacks that require physical access to the user's device" and "Attacks that require the ability to drop files in arbitrary locations on the user's filesystem" (which might apply to the attacker's ability to create links under HKLM\SOFTWARE\Wow6432Node\Valve\Steam\Apps).

The weakness was presented 08/07/2019. The identification of this vulnerability is CVE-2019-14743 since 08/07/2019. Attacking locally is a requirement. The successful exploitation requires a simple authentication. The technical details are unknown and an exploit is not publicly available.

The real existence of this vulnerability is still doubted at the moment.

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Valve

Name

• Steam Client

Version

• 2019-08-07

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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