5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2024-45052

CVE-2024-45052: Fides Webserver Authentication Timing-Based Username Enumeration Vulnerability

Fides is an open-source privacy engineering platform. Prior to version 2.44.0, a timing-based username enumeration vulnerability exists in Fides Webserver authentication. This vulnerability allows an unauthenticated attacker to determine the existence of valid usernames by analyzing the time it takes for the server to respond to login requests. The discrepancy in response times between valid and invalid usernames can be leveraged to enumerate users on the system. This vulnerability enables a timing-based username enumeration attack. An attacker can systematically guess and verify which usernames are valid by measuring the server's response time to authentication requests. This information can be used to conduct further attacks on authentication such as password brute-forcing and credential stuffing. The vulnerability has been patched in Fides version 2.44.0. Users are advised to upgrade to this version or later to secure their systems against this threat. There are no workarounds.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2024-45052

CVE-2024-45052:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

SSVC / BOD 26-04 ↗

Exploitation pocAutomatable YesTech Impact Partial

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Package Name	Ecosystem	Vulnerable Versions	First Patched Version
ethyca-fides	pip	< 2.44.0	2.44.0

Technical Details

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Root Cause Analysis

The vulnerability manifests in the authentication flow where response timing leaks username validity. The PoC shows measurable differences in 'starttransfer' time between valid/invalid users, indicating server-side processing differences. The login endpoint (/api/v1/login) handler is the logical location for username validation logic. The timing discrepancy suggests the function either: 1) Returns immediately for invalid users after username check, or 2) Performs additional password-related operations (hashing/verification) only for valid users. Both patterns create distinguishable timing signatures. While exact code isn't shown, the endpoint mapping and authentication workflow requirements strongly indicate this as the vulnerable component.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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