CVE-2020-35380: Github.com/tidwall/gjson Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-w942-gw6m-p62c
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CVSS 7.5
CWE-400
Published
Advisory Summary

CVE-2020-35380 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Github.com/tidwall/gjson libraries in the Go ecosystem. The issue involves denial of service in gjson. Remediation is available by upgrading affected packages to version 1.6.4.

CVE-2020-35380 at a Glance

CVE Identifier CVE-2020-35380
GHSA Identifier GHSA-w942-gw6m-p62c
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
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-2020-35380

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: 1.6.4 
Upgrade github.com/tidwall/gjson to 1.6.4
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 github.com/tidwall/gjson

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-35380, 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 1.6.4), 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. 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 before 1.6.4 allows attackers to cause a denial of service via crafted JSON. Due to improper bounds checking, maliciously crafted JSON objects can cause an out-of-bounds panic. If parsing user input, this may be used as a denial of service vector.

CVE-2020-35380 Affected Github.com/tidwall/gjson Versions

1 component(s)
Fixed Versions:
1.6.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/tidwall/gjson
golang/github.com/tidwall/gjson
Go
< 1.6.4
1.6.4

References

NVD — CVE-2020-35380 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35380
Github.com/tidwall/gjson Source Repository REPOSITORY
https://github.com/tidwall/gjson/issues/192
Security Fix Commit FIX COMMIT
https://github.com/tidwall/gjson/commit/f0ee9ebde4b619767ae4ac03e8e42addb530f6bc
Github.com/tidwall/gjson Source Repository REPOSITORY
https://github.com/tidwall/gjson
pkg.go.dev/vuln/go-2021-0059 WEB
https://pkg.go.dev/vuln/GO-2021-0059

Frequently Asked Questions

What is CVE-2020-35380?
CVE-2020-35380 is a security vulnerability in Github.com/tidwall/gjson involving Denial of service in GJSON under CWE-400: Uncontrolled Resource Consumption.
Which Github.com/tidwall/gjson versions are affected?
Affected versions include releases prior to 1.6.4 across affected packages: github.com/tidwall/gjson.
What version fixes CVE-2020-35380?
Upgrading to 1.6.4 (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 1.6.4. Upgrade your dependency to 1.6.4 or later.
What is the CVSS score of CVE-2020-35380?
CVE-2020-35380 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-2020-35380?
CVE-2020-35380 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check Go dependencies for CVE-2020-35380?
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-w942-gw6m-p62c",
  "modified" : "2024-05-20T19:27:54Z",
  "published" : "2021-06-23T17:53:05Z",
  "aliases" : [ "CVE-2020-35380" ],
  "summary" : "Denial of service in GJSON",
  "details" : "GJSON before 1.6.4 allows attackers to cause a denial of service via crafted JSON. Due to improper bounds checking, maliciously crafted JSON objects can cause an out-of-bounds panic. If parsing user input, this may be used as a denial of service vector.",
  "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" : "1.6.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35380"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tidwall/gjson/issues/192"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tidwall/gjson/commit/f0ee9ebde4b619767ae4ac03e8e42addb530f6bc"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/tidwall/gjson"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2021-0059"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-12T21:50:06Z",
    "nvd_published_at" : null
  }
}