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express-basic-auth Timing Attack due to native string comparison instead of constant time string comparison

Low severity GitHub Reviewed Published Jun 6, 2019 to the GitHub Advisory Database • Updated Jan 11, 2023

Package

npm express-basic-auth (npm)

Affected versions

< 1.1.7

Patched versions

1.1.7

Description

Versions of express-basic-auth prior to 1.1.7 are vulnerable to Timing Attacks. The package uses native string comparison instead of a constant time string comparison, which may lead to Timing Attacks. Timing Attacks can be used to increase the efficiency of brute-force attacks by removing the exponential increase in entropy gained from longer secrets.

Recommendation

Upgrade to version 1.1.7 or later.

References

Reviewed Jun 6, 2019
Published to the GitHub Advisory Database Jun 6, 2019
Last updated Jan 11, 2023

Severity

Low

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
Adjacent
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
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:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-c35v-qwqg-87jc

Source code

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