CVE-2019-0649: Microsoft.ChakraCore Chakra JIT Server Privilege Escalation Vulnerability

HIGH
Advisory Identifier: GHSA-6c6r-39cv-x5fq
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CVSS 8.1
Published
Advisory Summary

CVE-2019-0649 is a HIGH (CVSS 8.1) chakra jit server privilege escalation vulnerability (General Security Weakness) affecting Microsoft.ChakraCore libraries in the NuGet ecosystem. The issue involves chakra jit server privilege escalation. Remediation is available by upgrading affected packages to version 1.11.6.

CVE-2019-0649 at a Glance

CVE Identifier CVE-2019-0649
GHSA Identifier GHSA-6c6r-39cv-x5fq
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification General Security Weakness
Affected Product Microsoft.ChakraCore
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 8.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2019-0649

To remediate this vulnerability, upgrade all affected Microsoft.ChakraCore dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Microsoft.ChakraCore fixed: 1.11.6 
Upgrade Microsoft.ChakraCore to 1.11.6
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Microsoft.ChakraCore

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-0649, inspect your project dependencies for Microsoft.ChakraCore:

inspect dependencies for Microsoft.ChakraCore

Analyze the terminal output to locate any version of Microsoft.ChakraCore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.11.6), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Microsoft.ChakraCore, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability exists in Microsoft Chakra JIT server, aka 'Scripting Engine Elevation of Privileges Vulnerability'.

CVE-2019-0649 Affected Microsoft.ChakraCore Versions

1 component(s)
Fixed Versions:
1.11.6
Product / Package Ecosystem Affected Versions Fixed Version
Microsoft.ChakraCore
nuget/Microsoft.ChakraCore
NuGet
< 1.11.6
1.11.6

References

NVD — CVE-2019-0649 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-0649
Microsoft.ChakraCore Source Repository REPOSITORY
https://github.com/chakra-core/ChakraCore/pull/5936
Security Fix Commit FIX COMMIT
https://github.com/chakra-core/ChakraCore/commit/beba75a1aed0933cf3c76efb4dc67529dc035901
Microsoft.ChakraCore Source Repository REPOSITORY
https://github.com/chakra-core/ChakraCore
Microsoft.ChakraCore Security Information SECURITY
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0649
Microsoft.ChakraCore Security Information SECURITY
https://web.archive.org/web/20210125001406/https://www.securityfocus.com/bid/106877

Frequently Asked Questions

What is CVE-2019-0649?
CVE-2019-0649 is a security vulnerability in Microsoft.ChakraCore involving Chakra JIT server Privilege Escalation under General Security Weakness.
Which Microsoft.ChakraCore versions are affected?
Affected versions include releases prior to 1.11.6 across affected packages: Microsoft.ChakraCore.
What version fixes CVE-2019-0649?
Upgrading to 1.11.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Microsoft.ChakraCore affected?
Yes, Microsoft.ChakraCore is affected in releases prior to 1.11.6. Upgrade your dependency to 1.11.6 or later.
What is the CVSS score of CVE-2019-0649?
CVE-2019-0649 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2019-0649?
CVE-2019-0649 is classified under General Security Weakness.
How can I check NuGet dependencies for CVE-2019-0649?
Run the dependency tree command: 'inspect dependencies for Microsoft.ChakraCore'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6c6r-39cv-x5fq",
  "modified" : "2023-09-28T20:20:08Z",
  "published" : "2022-05-13T01:21:26Z",
  "aliases" : [ "CVE-2019-0649" ],
  "summary" : "Chakra JIT server Privilege Escalation ",
  "details" : "A vulnerability exists in Microsoft Chakra JIT server, aka 'Scripting Engine Elevation of Privileges Vulnerability'.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Microsoft.ChakraCore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.11.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-0649"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chakra-core/ChakraCore/pull/5936"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chakra-core/ChakraCore/commit/beba75a1aed0933cf3c76efb4dc67529dc035901"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chakra-core/ChakraCore"
  }, {
    "type" : "WEB",
    "url" : "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0649"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20210125001406/https://www.securityfocus.com/bid/106877"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-19T18:48:44Z",
    "nvd_published_at" : "2019-03-05T23:29:00Z"
  }
}