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Regular Expression Denial of Service in Deno.upgradeWebSocket API

Moderate severity GitHub Reviewed Published Mar 23, 2023 in denoland/deno • Updated Apr 3, 2023

Package

cargo deno (Rust)

Affected versions

>= 1.12.0, < 1.31.0

Patched versions

1.31.0

Description

Impact

Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the upgradeWebSocket function, which contains regexes in the form of /s*,s*/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to significantly slow down a web socket server.

Patches

It is recommended that users upgrade to Deno 1.31.0.

References

@bartlomieju bartlomieju published to denoland/deno Mar 23, 2023
Published to the GitHub Advisory Database Apr 3, 2023
Reviewed Apr 3, 2023
Last updated Apr 3, 2023

Severity

Moderate

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
Low

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:L

EPSS score

0.150%
(52nd percentile)

Weaknesses

CVE ID

CVE-2023-26103

GHSA ID

GHSA-jc97-h3h9-7xh6

Source code

Credits

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