9.8

CVSS Score

3.0

-

CVSS Score

Basic Information

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CVE-2014-8684

CVE-2014-8684: CodeIgniter and Kohana vulnerable to PHP Object Injection

CodeIgniter before 3.0 and Kohana 3.2.3 and earlier and 3.3.x through 3.3.2 make it easier for remote attackers to spoof session cookies and consequently conduct PHP object injection attacks by leveraging use of standard string comparison operators to compare cryptographic hashes.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2014-8684

CVE-2014-8684:

9.8

CVSS Score

3.0

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
codeigniter/framework	composer	< 3.0.0	3.0.0
kohana/core	composer	< 3.3.3	3.3.3

Technical Details

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Root Cause Analysis

The vulnerability arises from the use of non-constant-time string comparisons (===) for cryptographic hash/token validation. Kohana's Cookie::get and Security::check functions were explicitly patched in the provided commit (GHSA-w9ph-q4h9-rwq6) to replace === with a timing-safe comparison (slow_equals), confirming their vulnerability. For CodeIgniter, while the provided Session.php code (2.2.6) shows a constant-time HMAC check, the CVE indicates versions <3.0.0 are vulnerable. This suggests older CodeIgniter versions might have used insecure comparisons, but the specific vulnerable function isn't clear from the provided code. Thus, only Kohana's functions are listed with high confidence.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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