Intrusion Prevention

Symfony.HTTP.request.header.Security.Bypass

Description

This indicates an attack attempt to exploit a Security Bypass Vulnerability in the Symfony.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted request. A remote attacker may be able to exploit this to bypass the security mechanisms on the vulnerable application.

Affected Products

Symfony 2.7.0 to 2.7.48
Symfony 2.8.0 to 2.8.43
Symfony 3.3.0 to 3.3.17
Symfony 3.4.0 to 3.4.13
Symfony 4.0.0 to 4.0.13
Symfony 4.1.0 to 4.1.2

Impact

Security Bypass: Remote attackers can bypass security mechanism on vulnerable systems

Recommended Actions

Apply the most recent upgrade or patch from the vendor
https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers

CVE References

CVE-2018-14773