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LibreNMS vulnerable to rate limiting bypass on login page

Moderate severity GitHub Reviewed Published Nov 17, 2023 in librenms/librenms • Updated Nov 20, 2023

Package

composer librenms/librenms (Composer)

Affected versions

< 23.11.0

Patched versions

23.11.0

Description

Summary

Application is using two login methods and one of them is using GET request for authentication. There is no rate limiting security feature at GET request or backend is not validating that.

PoC

Go to /?username=admin&password=password&submit=
Capture request in Burpsuite intruder and add payload marker at password parameter value.
Start the attack after adding your password list
We have added 74 passwords
Check screenshot for more info
Screenshot 2023-11-06 at 8 55 19 PM

Impact

An attacker can Bruteforce user accounts and using GET request for authentication is not recommended because certain web servers logs all requests in old logs which can also store victim user credentials.

References

@murrant murrant published to librenms/librenms Nov 17, 2023
Published to the GitHub Advisory Database Nov 17, 2023
Reviewed Nov 17, 2023
Published by the National Vulnerability Database Nov 17, 2023
Last updated Nov 20, 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
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:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.096%
(41st percentile)

Weaknesses

CVE ID

CVE-2023-46745

GHSA ID

GHSA-rq42-58qf-v3qx

Source code

Credits

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