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llhttp allows HTTP Request Smuggling via Flawed Parsing of Transfer-Encoding

Critical severity GitHub Reviewed Published Jul 15, 2022 to the GitHub Advisory Database • Updated Jul 10, 2023

Package

npm llhttp (npm)

Affected versions

< 6.0.7

Patched versions

6.0.7

Description

The llhttp parser in the http module in Node.js v17.x does not correctly parse and validate Transfer-Encoding headers and can lead to HTTP Request Smuggling (HRS).

Impacts:

  • All versions of the nodejs 18.x, 16.x, and 14.x releases lines.
  • llhttp v6.0.7 and llhttp v2.1.5 contains the fixes that were updated inside Node.js

References

Published by the National Vulnerability Database Jul 14, 2022
Published to the GitHub Advisory Database Jul 15, 2022
Reviewed Jul 10, 2023
Last updated Jul 10, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS score

1.538%
(88th percentile)

Weaknesses

CVE ID

CVE-2022-32213

GHSA ID

GHSA-5689-v88g-g6rv

Source code

No known source code
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