7.5

CVSS Score

3.0

-

CVSS Score

Basic Information

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CVE-2018-8367

CVE-2018-8367: ChakraCore RCE Vulnerability

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8465, CVE-2018-8466, CVE-2018-8467.

(GitHub Advisory)

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CVE-2018-8367

CVE-2018-8367:

7.5

CVSS Score

3.0

-

CVSS Score

Basic Information

Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
Microsoft.ChakraCore	nuget	< 1.11.1	1.11.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from three key issues:

InitBoxedInlineSegments' failure to preserve inline segment behavior during copies created layout mismatches (CWE-787 vector).
DeepCopyInstance's unconditional inline segment allocation violated size-based memory safety checks.
GenerateArrayAllocHelper's lack of size capping allowed improperly sized inline segments. The commit patches explicitly modify these functions to address memory layout consistency and size enforcement, directly correlating with the described UAF/OOB write vulnerability.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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7.5

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2018-8367: ChakraCore RCE Vulnerability

CVE-2018-8367:

7.5

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Technical Details

7.5

7.5

Basic Information

Basic Information

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

CVE-2018-8367: ChakraCore RCE Vulnerability

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI