CVE-2020-36067: Github.com/tidwall/gjson Improper Validation Of Array Index Vulnerability

HIGH
Advisory Identifier: GHSA-p64j-r5f4-pwwx
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CVSS 7.5
CWE-129
Published
Advisory Summary

CVE-2020-36067 is a HIGH (CVSS 7.5) improper validation of array index vulnerability (CWE-129: Improper Validation of Array Index) affecting Github.com/tidwall/gjson libraries in the Go ecosystem. The issue involves improper validation of array index in gjson. Remediation is available by upgrading affected packages to version 1.6.6.

CVE-2020-36067 at a Glance

CVE Identifier CVE-2020-36067
GHSA Identifier GHSA-p64j-r5f4-pwwx
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-129: Improper Validation of Array Index
Affected Product Github.com/tidwall/gjson
Package Ecosystem Go
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

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

How to Fix CVE-2020-36067

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

github.com/tidwall/gjson fixed: 1.6.6 
Upgrade github.com/tidwall/gjson to 1.6.6
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 github.com/tidwall/gjson

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36067, inspect your project dependencies for Github.com/tidwall/gjson:

inspect dependencies for github.com/tidwall/gjson

Analyze the terminal output to locate any version of Github.com/tidwall/gjson in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6.6), 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 CWE-129: Improper Validation of Array Index, where the product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. In Github.com/tidwall/gjson, 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

GJSON < 1.6.6 allows attackers to cause a denial of service (panic: runtime error: slice bounds out of range) via a crafted GET call.

CVE-2020-36067 Affected Github.com/tidwall/gjson Versions

1 component(s)
Fixed Versions:
1.6.6
Product / Package Ecosystem Affected Versions Fixed Version
github.com/tidwall/gjson
golang/github.com/tidwall/gjson
Go
< 1.6.6
1.6.6

References

NVD — CVE-2020-36067 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36067
Github.com/tidwall/gjson Source Repository REPOSITORY
https://github.com/tidwall/gjson/issues/196
Security Fix Commit FIX COMMIT
https://github.com/tidwall/gjson/commit/bf4efcb3c18d1825b2988603dea5909140a5302b
Github.com/tidwall/gjson Source Repository REPOSITORY
https://github.com/tidwall/gjson
pkg.go.dev/vuln/go-2021-0054 WEB
https://pkg.go.dev/vuln/GO-2021-0054

Frequently Asked Questions

What is CVE-2020-36067?
CVE-2020-36067 is a security vulnerability in Github.com/tidwall/gjson involving Improper Validation of Array Index in GJSON under CWE-129: Improper Validation of Array Index.
Which Github.com/tidwall/gjson versions are affected?
Affected versions include releases prior to 1.6.6 across affected packages: github.com/tidwall/gjson.
What version fixes CVE-2020-36067?
Upgrading to 1.6.6 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/tidwall/gjson affected?
Yes, github.com/tidwall/gjson is affected in releases prior to 1.6.6. Upgrade your dependency to 1.6.6 or later.
What is the CVSS score of CVE-2020-36067?
CVE-2020-36067 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2020-36067?
CVE-2020-36067 is classified under CWE-129: Improper Validation of Array Index (The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.).
How can I check Go dependencies for CVE-2020-36067?
Run the dependency tree command: 'inspect dependencies for github.com/tidwall/gjson'. 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-p64j-r5f4-pwwx",
  "modified" : "2023-02-06T23:38:18Z",
  "published" : "2023-02-06T23:38:18Z",
  "aliases" : [ "CVE-2020-36067" ],
  "summary" : "Improper Validation of Array Index in GJSON",
  "details" : "GJSON < 1.6.6 allows attackers to cause a denial of service (panic: runtime error: slice bounds out of range) via a crafted GET call.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/tidwall/gjson"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.6.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36067"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tidwall/gjson/issues/196"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tidwall/gjson/commit/bf4efcb3c18d1825b2988603dea5909140a5302b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/tidwall/gjson"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2021-0054"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-129" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-02-06T23:38:18Z",
    "nvd_published_at" : null
  }
}