Microsoft Internet Explorer 9/10/11 Chakra Scripting Engine information disclosure

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Internet Explorer 9/10/11. The impacted element is an unknown function of the component Chakra Scripting Engine. Performing a manipulation results in information disclosure. This vulnerability is known as CVE-2019-0746. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Internet Explorer 9/10/11 (Web Browser). This affects some unknown processing of the component Chakra 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, integrity, and availability. The summary by CVE is:

An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory in Microsoft Edge, aka 'Scripting Engine Information Disclosure Vulnerability'.

The bug was discovered 03/12/2019. The weakness was published 03/12/2019 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated with Microsoft. This vulnerability is uniquely identified as CVE-2019-0746 since 11/26/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. The advisory points out:

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 100363 (Microsoft Internet Explorer Security Update for March 2019).

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

Similar entries are available at VDB-131618, VDB-131620, VDB-131621 and VDB-131623. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Microsoft

Name

• Internet Explorer

Version

• 9
• 10
• 11

License

• commercial

Support

• end of life

Website

• Vendor: https://www.microsoft.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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