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CVE-2012-6432

CVE-2012-6432 is a CWE-264 vulnerability in sensiolabs symfony. O3 Security detects and blocks CVE-2012-6432 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.

Symfony 2.0.x before 2.0.20, 2.1.x before 2.1.5, and 2.2-dev, when the internal routes configuration is enabled, allows remote attackers to access arbitrary services via vectors involving…

Published
Dec 27, 2012
Updated
Jun 16, 2026
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Jun 16, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

Symfony 2.0.x before 2.0.20, 2.1.x before 2.1.5, and 2.2-dev, when the internal routes configuration is enabled, allows remote attackers to access arbitrary services via vectors involving a URI beginning with a /_internal substring.

Affected Products

1 product · 26 configurations
Application
symfonysensiolabs
26 versions
2.0.02.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.92.0.102.0.11

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every sensiolabs symfony deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

  2. Remediation status

    No patch has shipped for CVE-2012-6432 yet — track the sensiolabs symfony advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

  4. How O3 protects you

    O3 detects and blocks CVE-2012-6432 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2012-6432. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Symfony 2.0.x before 2.0.20, 2.1.x before 2.1.5, and 2.2-dev, when the internal routes configuration is enabled, allows remote attackers to access arbitrary services via vectors involving a URI beginning with a /_internal substring.
O3 Security · Runtime Protection

Is CVE-2012-6432 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2012-6432 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.

CVE-2012-6432: Symfony CWE-264 | O3 Security