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CVE-2019-1196

CVE-2019-1196: Out-of-bounds write in ChakraCore

7.5

CVSS Score
3.0

Basic Information

CVE ID
CVE-2019-1196
GHSA ID
GHSA-hfm2-fffh-v47v
EPSS Score
0.78868%
CWE
CWE-787
Published
3/29/2021
Updated
5/31/2024
KEV Status
No
Technology
TechnologyC#

Technical Details

CVSS Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Package NameEcosystemVulnerable VersionsFirst Patched Version
Microsoft.ChakraCorenuget< 1.11.121.11.12

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from improper handling of memory operations in ChakraCore's JIT optimization passes. The commits show critical fixes in symbol tracking (BackwardPass), array buffer state management (GlobOpt), and property key conversion (JavascriptConversion). These functions directly relate to memory safety mechanisms - incorrect tracking of symbols/array states or type confusion in property keys could lead to the described out-of-bounds write vulnerability. The high-confidence assessment comes from the direct correlation between the patched logic and CWE-787 exploitation vectors.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

T** vuln*r**ility st*ms *rom improp*r **n*lin* o* m*mory op*r*tions in ***kr**or*'s JIT optimiz*tion p*ss*s. T** *ommits s*ow *riti**l *ix*s in sym*ol tr**kin* (`***kw*r*P*ss`), *rr*y *u***r st*t* m*n***m*nt (`*lo*Opt`), *n* prop*rty k*y *onv*rsion (