4.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2024-38827

CVE-2024-38827: Spring Framework has Authorization Bypass for Case Sensitive Comparisons

The usage of String.toLowerCase() and String.toUpperCase() has some Locale dependent exceptions that could potentially result in authorization rules not working properly.

(GitHub Advisory)

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CVE-2024-38827

CVE-2024-38827:

4.8

CVSS Score

3.1

-

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	< 5.7.14	5.7.14
org.springframework.security:spring-security-core	maven	>= 5.8.0, < 5.8.16	5.8.16
org.springframework.security:spring-security-core	maven	>= 6.0.0, < 6.0.14	6.0.14
org.springframework.security:spring-security-core	maven	>= 6.1.0, < 6.1.12	6.1.12
org.springframework.security:spring-security-core	maven	>= 6.2.0, < 6.2.8	6.2.8
org.springframework.security:spring-security-core	maven	>= 6.3.0, < 6.3.5	6.3.5

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability arises from using String.toLowerCase() and String.toUpperCase() without specifying Locale.ROOT. This can lead to inconsistent string conversions across different user locales, especially for characters like the Turkish 'i'. If these case conversions are used in security-critical contexts, such as comparing authorization tokens, role names, URLs, parameter names, or configuration values, an attacker might be able to bypass security checks by crafting input that evaluates differently in a specific locale compared to the locale expected by the security logic. The provided commit 11d4272ff48b4a4dabc4b28dfbff0364a4204bc9 patches numerous instances of this pattern across the Spring Framework codebase by explicitly using Locale.ROOT for these operations. Each function modified in this commit was potentially vulnerable if the string being converted was user-influenced or involved in a security decision. The confidence level for each function depends on how directly the string operation relates to a typical security mechanism (e.g., parameter name matching is high confidence, whereas string conversion in an error message is lower).

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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