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Regular Expression Denial of Service in Headers

High severity GitHub Reviewed Published Feb 16, 2023 in nodejs/undici • Updated Feb 16, 2023

Package

npm undici (npm)

Affected versions

< 5.19.1

Patched versions

5.19.1

Description

Impact

The Headers.set() and Headers.append() methods are vulnerable to Regular Expression Denial of Service (ReDoS) attacks when untrusted values are passed into the functions. This is due to the inefficient regular expression used to normalize the values in the headerValueNormalize() utility function.

Patches

This vulnerability was patched in v5.19.1.

Workarounds

There is no workaround. Please update to an unaffected version.

References

Credits

Carter Snook reported this vulnerability.

References

@mcollina mcollina published to nodejs/undici Feb 16, 2023
Published by the National Vulnerability Database Feb 16, 2023
Published to the GitHub Advisory Database Feb 16, 2023
Reviewed Feb 16, 2023
Last updated Feb 16, 2023

Severity

High

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
None
Integrity
None
Availability
High

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:N/I:N/A:H

EPSS score

0.198%
(58th percentile)

Weaknesses

CVE ID

CVE-2023-24807

GHSA ID

GHSA-r6ch-mqf9-qc9w

Source code

Credits

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