CVE-2014-4931
When investigating issue #11093, Jeremy Derussé found a serious code injection issue in the way Symfony implements translation caching in FrameworkBundle.
-
Your Symfony application is vulnerable if you meet the following conditions:
-
You are using the Symfony translation system from FrameworkBundle (so basically if you are using Symfony full-stack -- you are not affected if you are using the Translation component with Silex for instance); You don't sanitize locales coming from a URL (any route with a _locale argument for instance):
When vulnerable, an attacker can submit a non-valid locale value that can contain some PHP code that will be executed by Symfony. That's because the locale value is dumped into a PHP file generated in the cache without being sanitized first.
| Software | From | Fixed in |
|---|---|---|
symfony / framework-bundle
|
2.0.0 | 2.3.18 |
|
symfony / framework-bundle
|
2.4.0 | 2.4.8 |
|
symfony / framework-bundle
|
2.5.0 | 2.5.2 |
|
symfony / symfony
|
2.0.0 | 2.3.19 |
|
symfony / symfony
|
2.4.0 | 2.4.9 |
|
symfony / symfony
|
2.5.0 | 2.5.4 |
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/framework-bundle/CVE-2014-4931.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2014-4931.yaml
- https://github.com/symfony/symfony/commit/06a80fbdbe744ad6f3010479ba64ef5cf35dd9af.patch
- https://symfony.com/blog/security-releases-cve-2014-4931-symfony-2-3-18-2-4-8-and-2-5-2-released
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A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.
Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.
Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.
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