Microsoft Edge/ChakraCore Scripting Engine information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in Microsoft Edge and ChakraCore. Affected is an unknown function of the component Scripting Engine. The manipulation results in information disclosure. This vulnerability was named CVE-2020-0813. The attack may be performed from remote. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Microsoft Edge and ChakraCore (Web Browser) (unknown version). Affected is an unknown code block of the component Scripting Engine. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

An information disclosure vulnerability exists when Chakra improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user’s computer or data.To exploit the vulnerability, an attacker must know the memory address of where the object was created.The update addresses the vulnerability by changing the way certain functions handle objects in memory., aka 'Scripting Engine Information Disclosure Vulnerability'.

The weakness was presented 03/10/2020 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2020-0813. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/11/2020). The MITRE ATT&CK project declares the attack technique as T1592. The advisory points out:

An information disclosure vulnerability exists when Chakra improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user’s computer or data.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Web Browser

Vendor

• Microsoft

Name

• ChakraCore
• Edge

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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