5

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CVE-2012-5055

CVE-2012-5055: Exposure of Sensitive Information to an Unauthorized Actor in Spring Security

DaoAuthenticationProvider in VMware SpringSource Spring Security before 2.0.8, 3.0.x before 3.0.8, and 3.1.x before 3.1.3 does not check the password if the user is not found, which makes the response delay shorter and might allow remote attackers to enumerate valid usernames via a series of login requests.

(GitHub Advisory)

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CVE-2012-5055

CVE-2012-5055:

5

CVSS Score

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.springframework.security:spring-security-core	maven	< 2.0.8	2.0.8
org.springframework.security:spring-security-core	maven	>= 3.0.0, < 3.0.8	3.0.8
org.springframework.security:spring-security-core	maven	>= 3.1.0, < 3.1.3	3.1.3

Technical Details

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Root Cause Analysis

The vulnerability occurs because the authentication flow skips password checks for non-existent users. The authenticate method in AbstractUserDetailsAuthenticationProvider is the central coordinator: it calls retrieveUser (from DaoAuthenticationProvider) to load the user. If retrieveUser throws due to a missing user, authenticate does not execute additionalAuthenticationChecks, creating a measurable time difference. Both methods appear in runtime traces during exploitation: retrieveUser when the user lookup fails, and authenticate when it handles the exception and skips the password check. The lack of password-related function calls (e.g., additionalAuthenticationChecks) in invalid username scenarios would be detectable via profiling.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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