CVE-2018-14774 Symfony Host Header Injection

What is CVE-2018-14774?

CVE-2018-14774 is a high-severity vulnerability in Sensiolabs Symfony, published on 3 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in HttpKernel in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. When using HttpCache, the values of the X-Forwarded-Host headers are implicitly set as trusted while this should be forbidden, leading to potential host header injection.

Weakness: CWE-20

Which versions are affected by CVE-2018-14774?

12 open source packages ship an affected version, including symfony/symfony. It affects 1 product.

Products include Sensiolabs Symfony.

How do I fix CVE-2018-14774?

Upgrade symfony/symfony to a fixed version for your release line: 2.7.49, 2.8.44, 3.3.18 or 3.4.14.

Is CVE-2018-14774 being exploited?

There is no known exploitation of CVE-2018-14774 in the wild and no public exploit code.

Other vulnerabilities in Sensiolabs Symfony

• CVE-2019-11325 Improper Input Validation in Symfony Critical 9.8
• CVE-2017-11365 Symfony Incorrect Access Control Critical 9.8
• CVE-2019-10913 Invalid HTTP method overrides allow possible XSS or other attacks in Symfony Critical 9.8
• CVE-2018-11407 Symfony Authentication Bypass Critical 9.8
• CVE-2016-2403 Symfony Authentication Bypass Critical 9.8

All Sensiolabs Symfony vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-14774, GHSA-66p6-7p29-55p9, UBUNTU-CVE-2018-14774.