5.3

CVSS Score

3.1

-

CVSS Score

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CVE-2023-46745

CVE-2023-46745: LibreNMS vulnerable to rate limiting bypass on login page

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 <img width="1241" alt="Screenshot 2023-11-06 at 8 55 19 PM" src="https://user-images.githubusercontent.com/31764504/280905148-42274f1e-f869-4145-95b4-71c0bffde3a0.png">

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.

(GitHub Advisory)

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CVE-2023-46745

CVE-2023-46745:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
librenms/librenms	composer	< 23.11.0	23.11.0

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from the LegacyExternalAuth middleware's handling of GET requests for authentication. The pre-patch code (shown in diff) directly processed GET parameters for authentication without: 1) Rate limiting controls, and 2) A configuration guard (auth.allow_get_login) that was added in the patch. This allowed attackers to bypass POST-based rate limiting by using GET requests, which were both unlogged in rate limiting systems and could be executed at scale. The commit explicitly addresses this by wrapping the GET authentication logic behind a disabled-by-default configuration flag.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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5.3

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2023-46745: LibreNMS vulnerable to rate limiting bypass on login page

Summary

PoC

Impact

CVE-2023-46745:

5.3

-

Basic Information

Basic Information

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Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

Vulnerability IntelligenceMiggo AI

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WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

Basic Information

Basic Information

5.3

5.3

Technical Details

CVE-2023-46745: LibreNMS vulnerable to rate limiting bypass on login page

Summary

PoC

Impact

Vulnerability Intelligence
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Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
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