CVE-2017-11871: Microsoft.ChakraCore Chakra Core Vulnerable To Privilege Vulnerability

HIGH
Advisory Identifier: GHSA-43qp-hphf-5rjw
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CVSS 7.5
CWE-119
Published
Advisory Summary

CVE-2017-11871 is a HIGH (CVSS 7.5) chakra core vulnerable to privilege vulnerability (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) affecting Microsoft.ChakraCore libraries in the NuGet ecosystem. The issue involves chakra core vulnerable to privilege escalation due to reading an invalid pointer. Remediation is available by upgrading affected packages to version 1.7.4.

CVE-2017-11871 at a Glance

CVE Identifier CVE-2017-11871
GHSA Identifier GHSA-43qp-hphf-5rjw
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
Affected Product Microsoft.ChakraCore
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:R/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 Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2017-11871

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: 1.7.4 
Upgrade Microsoft.ChakraCore to 1.7.4
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-2017-11871, 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 1.7.4), 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 CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer, where the product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. this may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. 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

ChakraCore and Microsoft Edge in Windows 10 1703, 1709, and Windows Server, version 1709 allows an attacker to gain the same user rights as the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". When trying to get `inlineCache`s for a `ScriptFunctionWithInlineCache`, if the function got redefered and was not reparsed, the function body (and `inlineCache` on function body) won’t be there, potentially leading to a privilege escalation. This CVE ID is unique from CVE-2017-11836, CVE-2017-11837, CVE-2017-11838, CVE-2017-11839, CVE-2017-11840, CVE-2017-11841, CVE-2017-11843, CVE-2017-11846, CVE-2017-11858, CVE-2017-11859, CVE-2017-11861, CVE-2017-11862, CVE-2017-11866, CVE-2017-11869, CVE-2017-11870, and CVE-2017-11873.

CVE-2017-11871 Affected Microsoft.ChakraCore Versions

1 component(s)
Fixed Versions:
1.7.4
Product / Package Ecosystem Affected Versions Fixed Version
Microsoft.ChakraCore
nuget/Microsoft.ChakraCore
NuGet
< 1.7.4
1.7.4

References

NVD — CVE-2017-11871 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-11871
Microsoft.ChakraCore Source Repository REPOSITORY
https://github.com/chakra-core/ChakraCore/pull/4226
Security Fix Commit FIX COMMIT
https://github.com/chakra-core/ChakraCore/commit/9d211a417757ba1ddcd0f2e72d9553535256107e
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-2017-11871
Microsoft.ChakraCore Security Information SECURITY
https://web.archive.org/web/20210124114740/http://www.securityfocus.com/bid/101730
Microsoft.ChakraCore Security Information SECURITY
https://web.archive.org/web/20210517135249/http://www.securitytracker.com/id/1039780

Frequently Asked Questions

What is CVE-2017-11871?
CVE-2017-11871 is a security vulnerability in Microsoft.ChakraCore involving Chakra Core vulnerable to privilege escalation due to reading an invalid pointer under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer.
Which Microsoft.ChakraCore versions are affected?
Affected versions include releases prior to 1.7.4 across affected packages: Microsoft.ChakraCore.
What version fixes CVE-2017-11871?
Upgrading to 1.7.4 (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 1.7.4. Upgrade your dependency to 1.7.4 or later.
What is the CVSS score of CVE-2017-11871?
CVE-2017-11871 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2017-11871?
CVE-2017-11871 is classified under CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer (The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.).
How can I check NuGet dependencies for CVE-2017-11871?
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-43qp-hphf-5rjw",
  "modified" : "2023-10-10T16:27:10Z",
  "published" : "2022-05-17T00:19:54Z",
  "aliases" : [ "CVE-2017-11871" ],
  "summary" : "Chakra Core vulnerable to privilege escalation due to reading an invalid pointer",
  "details" : "ChakraCore and Microsoft Edge in Windows 10 1703, 1709, and Windows Server, version 1709 allows an attacker to gain the same user rights as the current user, due to how the scripting engine handles objects in memory, aka \"Scripting Engine Memory Corruption Vulnerability\". When trying to get `inlineCache`s for a `ScriptFunctionWithInlineCache`, if the function got redefered and was not reparsed, the function body (and `inlineCache` on function body) won’t be there, potentially leading to a privilege escalation.\n\nThis CVE ID is unique from CVE-2017-11836, CVE-2017-11837, CVE-2017-11838, CVE-2017-11839, CVE-2017-11840, CVE-2017-11841, CVE-2017-11843, CVE-2017-11846, CVE-2017-11858, CVE-2017-11859, CVE-2017-11861, CVE-2017-11862, CVE-2017-11866, CVE-2017-11869, CVE-2017-11870, and CVE-2017-11873.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Microsoft.ChakraCore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.7.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-11871"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chakra-core/ChakraCore/pull/4226"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chakra-core/ChakraCore/commit/9d211a417757ba1ddcd0f2e72d9553535256107e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chakra-core/ChakraCore"
  }, {
    "type" : "WEB",
    "url" : "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11871"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20210124114740/http://www.securityfocus.com/bid/101730"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20210517135249/http://www.securitytracker.com/id/1039780"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-27T19:39:18Z",
    "nvd_published_at" : "2017-11-15T03:29:00Z"
  }
}