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Regular Expression Denial of Service (ReDoS)

High severity GitHub Reviewed Published Mar 19, 2021 to the GitHub Advisory Database • Updated Sep 21, 2023

Package

npm ssri (npm)

Affected versions

>= 5.2.2, < 6.0.2
>= 7.0.0, < 7.1.1
= 8.0.0

Patched versions

6.0.2
7.1.1
8.0.1

Description

npm ssri 5.2.2-6.0.1 and 7.0.0-8.0.0, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option.

References

Published by the National Vulnerability Database Mar 12, 2021
Reviewed Mar 15, 2021
Published to the GitHub Advisory Database Mar 19, 2021
Last updated Sep 21, 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

0.242%
(65th percentile)

Weaknesses

CVE ID

CVE-2021-27290

GHSA ID

GHSA-vx3p-948g-6vhq

Source code

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