Microsoft Edge/ChakraCore Chakra Scripting Engine memory corruption

A vulnerability was found in Microsoft Edge and ChakraCore (Web Browser) (the affected version is unknown). It has been declared as critical. This vulnerability affects a code block of the component Chakra Scripting Engine. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 05/14/2019 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with the vendor. This vulnerability was named CVE-2019-0924. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 $5k-$25k (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.

The entries 134688, 134689, 134690 and 134691 are pretty similar.

Vendor

• Microsoft

Name

• Edge
• ChakraCore

• ?
• ?

• ?
• ?

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-2019-0924 (?)
See also: ?

Created: 05/14/2019 09:15 PM
Complete: ?

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