CVE-2020-7753: Trim Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-w5p7-h5w8-2hfq
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CVSS 7.5
CWE-400
Published
Advisory Summary

CVE-2020-7753 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Trim libraries in the npm ecosystem. The issue involves regular expression denial of service in trim. Remediation is available by upgrading affected packages to version 0.0.3.

CVE-2020-7753 at a Glance

CVE Identifier CVE-2020-7753
GHSA Identifier GHSA-w5p7-h5w8-2hfq
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Trim
Package Ecosystem npm
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-2020-7753

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

trim fixed: 0.0.3 
npm install trim@0.0.3
Verify Direct and Transitive Dependencies

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

npm ls trim

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-7753, inspect your project dependencies using npm:

npm ls trim

Analyze the terminal output to locate any version of Trim in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.3), your application is affected.

Note: The npm ls trim command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

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 Trim, 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

All versions of package trim lower than 0.0.3 are vulnerable to Regular Expression Denial of Service (ReDoS) via trim().

CVE-2020-7753 Affected Trim Versions

1 component(s)
Fixed Versions:
0.0.3
Product / Package Ecosystem Affected Versions Fixed Version
trim
npm/trim
npm
< 0.0.3
0.0.3

References

NVD — CVE-2020-7753 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7753
Trim Source Repository REPOSITORY
https://github.com/component/trim/pull/8
Trim Source Repository REPOSITORY
https://github.com/component/trim
Trim Source Repository REPOSITORY
https://github.com/component/trim/blob/master/index.js
Trim Source Repository REPOSITORY
https://github.com/component/trim/blob/master/index.js%23L6
lists.apache.org/thread.html/r10faad... WEB
https://lists.apache.org/thread.html/r10faad1ef9166d37a1a5c9142b1af7099b8ecdc5ad05c51b8ea993d9@%3Ccommits.airflow.apache.org%3E
lists.apache.org/thread.html/r51ff3c... WEB
https://lists.apache.org/thread.html/r51ff3c2a4c7b8402f321eae7e624672cc2295c7bc8c12c8b871f6b0b@%3Ccommits.airflow.apache.org%3E
lists.apache.org/thread.html/r75b8d0... WEB
https://lists.apache.org/thread.html/r75b8d0b88833d7d96afcdce3ead65e212572ead4e7a9f34d21040196@%3Ccommits.airflow.apache.org%3E
lists.apache.org/thread.html/rb8462d... WEB
https://lists.apache.org/thread.html/rb8462df3b6484e778905c09cd49a8912e1a302659860017ebe36da03@%3Ccommits.airflow.apache.org%3E
lists.apache.org/thread.html/rcc7c28... WEB
https://lists.apache.org/thread.html/rcc7c2865a52b544a8e49386c6880e9b9ab29bfce1052b5569d09ee4a@%3Ccommits.airflow.apache.org%3E
snyk.io/vuln/snyk-java-orgw... WEB
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1022132
snyk.io/vuln/snyk-js-trim-1... WEB
https://snyk.io/vuln/SNYK-JS-TRIM-1017038

Frequently Asked Questions

What is CVE-2020-7753?
CVE-2020-7753 is a security vulnerability in Trim involving Regular Expression Denial of Service in trim under CWE-400: Uncontrolled Resource Consumption.
Which Trim versions are affected?
Affected versions include releases prior to 0.0.3 across affected packages: trim.
What version fixes CVE-2020-7753?
Upgrading to 0.0.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is trim affected?
Yes, trim is affected in releases prior to 0.0.3. Upgrade your dependency to 0.0.3 or later.
What is the CVSS score of CVE-2020-7753?
CVE-2020-7753 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-2020-7753?
CVE-2020-7753 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 npm dependencies for CVE-2020-7753?
Run the dependency tree command: 'npm ls trim'. 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-w5p7-h5w8-2hfq",
  "modified" : "2022-04-27T19:19:28Z",
  "published" : "2021-05-10T18:44:22Z",
  "aliases" : [ "CVE-2020-7753" ],
  "summary" : "Regular Expression Denial of Service in trim",
  "details" : "All versions of package trim lower than 0.0.3 are vulnerable to Regular Expression Denial of Service (ReDoS) via trim().",
  "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" : "npm",
      "name" : "trim"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7753"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/component/trim/pull/8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/component/trim"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/component/trim/blob/master/index.js"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/component/trim/blob/master/index.js%23L6"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r10faad1ef9166d37a1a5c9142b1af7099b8ecdc5ad05c51b8ea993d9@%3Ccommits.airflow.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r51ff3c2a4c7b8402f321eae7e624672cc2295c7bc8c12c8b871f6b0b@%3Ccommits.airflow.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/r75b8d0b88833d7d96afcdce3ead65e212572ead4e7a9f34d21040196@%3Ccommits.airflow.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/rb8462df3b6484e778905c09cd49a8912e1a302659860017ebe36da03@%3Ccommits.airflow.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread.html/rcc7c2865a52b544a8e49386c6880e9b9ab29bfce1052b5569d09ee4a@%3Ccommits.airflow.apache.org%3E"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1022132"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-TRIM-1017038"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-21T17:44:44Z",
    "nvd_published_at" : "2020-10-27T09:15:00Z"
  }
}