Microsoft Visual C++ Redistributable DLL Loader Search Path untrusted search path

Summaryinfo

A vulnerability was found in Microsoft Visual C++ Redistributable. It has been declared as problematic. This affects an unknown part of the component DLL Loader. Executing a manipulation as part of Search Path can lead to untrusted search path. This vulnerability is tracked as CVE-2018-0599. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability has been found in Microsoft Visual C++ Redistributable (version now known) and classified as problematic. This vulnerability affects some unknown processing of the component DLL Loader. The manipulation as part of a Search Path leads to a untrusted search path vulnerability. The CWE definition for the vulnerability is CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Untrusted search path vulnerability in the installer of Visual C++ Redistributable allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.

The bug was discovered 05/17/2018. The weakness was disclosed 06/26/2018 (Website). The advisory is available at jvn.jp. This vulnerability was named CVE-2018-0599 since 11/27/2017. Local access is required to approach this attack. Required for exploitation is a single authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/22/2020). This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 40 days. During that time the estimated underground price was around $5k-$25k.

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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Productinfo

Vendor

• Microsoft

Name

• Visual C++ Redistributable

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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