CVE-2022-35948: Undici Nodejs ‘undici’ Vulnerable To CRLF Vulnerability

MODERATE
Advisory Identifier: GHSA-f772-66g8-q5h3
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CVSS 5.3
CWE-74 CWE-93
Published
Advisory Summary

CVE-2022-35948 is a MODERATE (CVSS 5.3) nodejs ‘undici’ vulnerable to crlf vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) affecting Undici libraries in the npm ecosystem. The issue involves nodejs ‘undici’ vulnerable to crlf injection via content-type. Remediation is available by upgrading affected packages to version 5.8.2.

CVE-2022-35948 at a Glance

CVE Identifier CVE-2022-35948
GHSA Identifier GHSA-f772-66g8-q5h3
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Product Undici
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:L/A:N).

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 Low (I:L)
Availability None (A:N)

How to Fix CVE-2022-35948

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

undici fixed: 5.8.2 
npm install undici@5.8.2
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 undici

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2022-35948, inspect your project dependencies using npm:

npm ls undici

Analyze the terminal output to locate any version of Undici in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.8.2), your application is affected.

Note: The npm ls undici 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-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), where the product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. In Undici, 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

### Impact `=< undici@5.8.0` users are vulnerable to _CRLF Injection_ on headers when using unsanitized input as request headers, more specifically, inside the `content-type` header. Example: ``` import { request } from 'undici' const unsanitizedContentTypeInput = 'application/json\r\n\r\nGET /foo2 HTTP/1.1' await request('http://localhost:3000, { method: 'GET', headers: { 'content-type': unsanitizedContentTypeInput }, }) ``` The above snippet will perform two requests in a single `request` API call: 1) `http://localhost:3000/` 2) `http://localhost:3000/foo2` ### Patches This issue was patched in Undici v5.8.1 ### Workarounds Sanitize input when sending content-type headers using user input. ## For more information If you have any questions or comments about this advisory: - Open an issue in [undici repository](https://github.com/nodejs/undici/issues) - To make a report, follow the [SECURITY](https://github.com/nodejs/node/blob/HEAD/SECURITY.md) document

CVE-2022-35948 Affected Undici Versions

1 component(s)
Fixed Versions:
5.8.2
Product / Package Ecosystem Affected Versions Fixed Version
undici
npm/undici
npm
< 5.8.2
5.8.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/nodejs/undici/security/advisories/GHSA-f772-66g8-q5h3
NVD — CVE-2022-35948 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-35948
Security Fix Commit FIX COMMIT
https://github.com/nodejs/undici/commit/66165d604fd0aee70a93ed5c44ad4cc2df395f80
Undici Source Repository REPOSITORY
https://github.com/nodejs/undici
Undici Release RELEASE
https://github.com/nodejs/undici/releases/tag/v5.8.2

Frequently Asked Questions

What is CVE-2022-35948?
CVE-2022-35948 is a security vulnerability in Undici involving Nodejs ‘undici’ vulnerable to CRLF Injection via Content-Type under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection').
Which Undici versions are affected?
Affected versions include releases prior to 5.8.2 across affected packages: undici.
What version fixes CVE-2022-35948?
Upgrading to 5.8.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is undici affected?
Yes, undici is affected in releases prior to 5.8.2. Upgrade your dependency to 5.8.2 or later.
What is the CVSS score of CVE-2022-35948?
CVE-2022-35948 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2022-35948?
CVE-2022-35948 is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.).
How can I check npm dependencies for CVE-2022-35948?
Run the dependency tree command: 'npm ls undici'. 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-f772-66g8-q5h3",
  "modified" : "2023-01-19T01:01:59Z",
  "published" : "2022-08-18T19:02:56Z",
  "aliases" : [ "CVE-2022-35948" ],
  "summary" : "Nodejs ‘undici’ vulnerable to CRLF Injection via Content-Type",
  "details" : "### Impact\n\n`=< undici@5.8.0` users are vulnerable to _CRLF Injection_ on headers when using unsanitized input as request headers, more specifically, inside the `content-type` header.\n\nExample:\n\n```\nimport { request } from 'undici'\n\nconst unsanitizedContentTypeInput =  'application/json\\r\\n\\r\\nGET /foo2 HTTP/1.1'\n\nawait request('http://localhost:3000, {\n    method: 'GET',\n    headers: {\n      'content-type': unsanitizedContentTypeInput\n    },\n})\n```\n\nThe above snippet will perform two requests in a single `request` API call:\n\n1) `http://localhost:3000/`\n2) `http://localhost:3000/foo2`\n\n### Patches\n\nThis issue was patched in Undici v5.8.1\n\n### Workarounds\n\nSanitize input when sending content-type headers using user input.\n\n## For more information\nIf you have any questions or comments about this advisory:\n\n- Open an issue in [undici repository](https://github.com/nodejs/undici/issues)\n- To make a report, follow the [SECURITY](https://github.com/nodejs/node/blob/HEAD/SECURITY.md) document",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "undici"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.8.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.8.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/security/advisories/GHSA-f772-66g8-q5h3"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-35948"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/commit/66165d604fd0aee70a93ed5c44ad4cc2df395f80"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nodejs/undici"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/releases/tag/v5.8.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74", "CWE-93" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-08-18T19:02:56Z",
    "nvd_published_at" : "2022-08-15T11:21:00Z"
  }
}