Microsoft Edge/ChakraCore Chakra Scripting Engine memory corruption

A vulnerability was found in Microsoft Edge and ChakraCore (Web Browser) (affected version not known) and classified as critical. Affected by this issue is a part of the component Chakra Scripting Engine. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. Impacted is confidentiality, integrity, and availability.

The weakness was published 05/14/2019 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The public release has been coordinated with the vendor. This vulnerability is handled as CVE-2019-0917. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 05/14/2019). 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.

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 134686, 134687, 134688 and 134689.

Vendor

• Microsoft

Name

• Edge
• ChakraCore

• ?
• ?

• ?
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VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: ?
VulDB Reliability: ?

Vendor Base Score (Microsoft): 4.2
Vendor Vector (Microsoft): ?

VulDB Base Score: ?
VulDB Temp Score: ?
VulDB Reliability: ?
Class: Memory corruption (CWE-119)
Local: No
Remote: Yes

Availability: ?
Status: Not defined

Price Prediction: ?
Current Price Estimation: ?

Threat Intelligenceinfoedit

Threat: ?
Adversaries: ?
Geopolitics: ?
Economy: ?
Predictions: ?
Remediation: ?Recommended: Patch
Status: ?
Reaction Time: ?
0-Day Time: ?
Exposure Time: ?05/14/2019 Advisory disclosed
05/14/2019 +0 days Countermeasure disclosed
05/14/2019 +0 days VulDB entry created
05/14/2019 +0 days VulDB last updateAdvisory: portal.msrc.microsoft.com
Status: Confirmed
Coordinated: ?

CVE: CVE-2019-0917 (?)
See also: ?

Created: 05/14/2019 09:14 PM
Complete: ?

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