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Lack of URL normalization may lead to authorization bypass when URL access rules are used

Moderate severity GitHub Reviewed Published Sep 9, 2020 in LemonLDAPNG/node-lemonldap-ng-handler • Updated Jan 9, 2023

Package

npm lemonldap-ng-handler (npm)

Affected versions

< 0.5.2

Patched versions

0.5.2

Description

Impact

When access rules are used inside a protected host, some URL encodings may bypass filtering system.

Patches

Version 0.5.2 includes a patch that fixes the vulnerability

Workarounds

No way for users to fix or remediate the vulnerability without upgrading

References

https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2290

For more information

If you have any questions or comments about this advisory:

References

@guimard guimard published to LemonLDAPNG/node-lemonldap-ng-handler Sep 9, 2020
Reviewed Sep 9, 2020
Published to the GitHub Advisory Database Sep 9, 2020
Last updated Jan 9, 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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
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:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

1.873%
(89th percentile)

Weaknesses

CVE ID

CVE-2020-24660

GHSA ID

GHSA-x44x-r84w-8v67

Source code

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