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CVE-2014-5244 Symfony vulnerable to denial of service via a malicious HTTP Host header

HighCVSS 7.5 PoC
Published
Unknown
Updated
Exploit status
Proof-of-concept only

Description

All 2.0.X, 2.1.X, 2.2.X, 2.3.X, 2.4.X, and 2.5.X versions of the Symfony HttpFoundation component are affected by this security issue.

This issue has been fixed in Symfony 2.3.19, 2.4.9, and 2.5.4. Note that no fixes are provided for Symfony 2.0, 2.1, and 2.2 as they are not maintained anymore.

Description
When an arbitrarily long hostname is sent by a client, its parsing in Request::getHost() can lead to a DoS attack, due to the way we validate the hostname via a regular expression.

Resolution
The regular expression used to parse and validate the hostname from the HTTP request has been modified to avoid too much sensitivity to the submitted value length.

The patch for this issue is available here: https://github.com/symfony/symfony/pull/11828

Affected products

ProductAffected versionsFixed in
symfony/http-foundation(Packagist) >= 2.0.0, < 2.3.19 2.3.19
symfony/http-foundation(Packagist) = 2.0.4 No fix listed
symfony/http-foundation(Packagist) = 2.0.5 No fix listed
symfony/http-foundation(Packagist) = 2.0.6 No fix listed
symfony/http-foundation(Packagist) = 2.0.7 No fix listed
symfony/http-foundation(Packagist) = v2.0.10 No fix listed
symfony/http-foundation(Packagist) = v2.0.12 No fix listed
symfony/http-foundation(Packagist) = v2.0.13 No fix listed
symfony/http-foundation(Packagist) = v2.0.14 No fix listed
symfony/http-foundation(Packagist) = v2.0.15 No fix listed
symfony/http-foundation(Packagist) = v2.0.16 No fix listed
symfony/http-foundation(Packagist) = v2.0.17 No fix listed
symfony/http-foundation(Packagist) = v2.0.18 No fix listed
symfony/http-foundation(Packagist) = v2.0.19 No fix listed
symfony/http-foundation(Packagist) = v2.0.20 No fix listed
symfony/http-foundation(Packagist) = v2.0.21 No fix listed
symfony/http-foundation(Packagist) = v2.0.22 No fix listed
symfony/http-foundation(Packagist) = v2.0.23 No fix listed
symfony/http-foundation(Packagist) = v2.0.24 No fix listed
symfony/http-foundation(Packagist) = v2.0.25 No fix listed
symfony/http-foundation(Packagist) = v2.0.9 No fix listed
symfony/http-foundation(Packagist) = v2.1.0 No fix listed
symfony/http-foundation(Packagist) = v2.1.1 No fix listed
symfony/http-foundation(Packagist) = v2.1.10 No fix listed
symfony/http-foundation(Packagist) = v2.1.11 No fix listed
Show 152 more
ProductAffected versionsFixed in
symfony/http-foundation(Packagist) = v2.1.12 No fix listed
symfony/http-foundation(Packagist) = v2.1.13 No fix listed
symfony/http-foundation(Packagist) = v2.1.2 No fix listed
symfony/http-foundation(Packagist) = v2.1.3 No fix listed
symfony/http-foundation(Packagist) = v2.1.4 No fix listed
symfony/http-foundation(Packagist) = v2.1.5 No fix listed
symfony/http-foundation(Packagist) = v2.1.6 No fix listed
symfony/http-foundation(Packagist) = v2.1.7 No fix listed
symfony/http-foundation(Packagist) = v2.1.8 No fix listed
symfony/http-foundation(Packagist) = v2.1.9 No fix listed
symfony/http-foundation(Packagist) = v2.2.0 No fix listed
symfony/http-foundation(Packagist) = v2.2.1 No fix listed
symfony/http-foundation(Packagist) = v2.2.10 No fix listed
symfony/http-foundation(Packagist) = v2.2.11 No fix listed
symfony/http-foundation(Packagist) = v2.2.2 No fix listed
symfony/http-foundation(Packagist) = v2.2.3 No fix listed
symfony/http-foundation(Packagist) = v2.2.4 No fix listed
symfony/http-foundation(Packagist) = v2.2.5 No fix listed
symfony/http-foundation(Packagist) = v2.2.6 No fix listed
symfony/http-foundation(Packagist) = v2.2.7 No fix listed
symfony/http-foundation(Packagist) = v2.2.8 No fix listed
symfony/http-foundation(Packagist) = v2.2.9 No fix listed
symfony/http-foundation(Packagist) = v2.3.0 No fix listed
symfony/http-foundation(Packagist) = v2.3.1 No fix listed
symfony/http-foundation(Packagist) = v2.3.10 No fix listed
symfony/http-foundation(Packagist) = v2.3.11 No fix listed
symfony/http-foundation(Packagist) = v2.3.12 No fix listed
symfony/http-foundation(Packagist) = v2.3.13 No fix listed
symfony/http-foundation(Packagist) = v2.3.14 No fix listed
symfony/http-foundation(Packagist) = v2.3.15 No fix listed
symfony/http-foundation(Packagist) = v2.3.16 No fix listed
symfony/http-foundation(Packagist) = v2.3.17 No fix listed
symfony/http-foundation(Packagist) = v2.3.18 No fix listed
symfony/http-foundation(Packagist) = v2.3.2 No fix listed
symfony/http-foundation(Packagist) = v2.3.3 No fix listed
symfony/http-foundation(Packagist) = v2.3.4 No fix listed
symfony/http-foundation(Packagist) = v2.3.5 No fix listed
symfony/http-foundation(Packagist) = v2.3.6 No fix listed
symfony/http-foundation(Packagist) = v2.3.7 No fix listed
symfony/http-foundation(Packagist) = v2.3.8 No fix listed
symfony/http-foundation(Packagist) = v2.3.9 No fix listed
symfony/http-foundation(Packagist) >= 2.4.0, < 2.4.9 2.4.9
symfony/http-foundation(Packagist) = v2.4.0 No fix listed
symfony/http-foundation(Packagist) = v2.4.1 No fix listed
symfony/http-foundation(Packagist) = v2.4.2 No fix listed
symfony/http-foundation(Packagist) = v2.4.3 No fix listed
symfony/http-foundation(Packagist) = v2.4.4 No fix listed
symfony/http-foundation(Packagist) = v2.4.5 No fix listed
symfony/http-foundation(Packagist) = v2.4.6 No fix listed
symfony/http-foundation(Packagist) = v2.4.7 No fix listed
symfony/http-foundation(Packagist) = v2.4.8 No fix listed
symfony/http-foundation(Packagist) >= 2.5.0, < 2.5.4 2.5.4
symfony/http-foundation(Packagist) = v2.5.0 No fix listed
symfony/http-foundation(Packagist) = v2.5.1 No fix listed
symfony/http-foundation(Packagist) = v2.5.2 No fix listed
symfony/http-foundation(Packagist) = v2.5.3 No fix listed
symfony/symfony(Packagist) >= 2.0.0, < 2.3.19 2.3.19
symfony/symfony(Packagist) = 2.0.4 No fix listed
symfony/symfony(Packagist) = 2.0.5 No fix listed
symfony/symfony(Packagist) = 2.0.6 No fix listed
symfony/symfony(Packagist) = 2.0.7 No fix listed
symfony/symfony(Packagist) = v2.0.10 No fix listed
symfony/symfony(Packagist) = v2.0.11 No fix listed
symfony/symfony(Packagist) = v2.0.12 No fix listed
symfony/symfony(Packagist) = v2.0.13 No fix listed
symfony/symfony(Packagist) = v2.0.14 No fix listed
symfony/symfony(Packagist) = v2.0.15 No fix listed
symfony/symfony(Packagist) = v2.0.16 No fix listed
symfony/symfony(Packagist) = v2.0.17 No fix listed
symfony/symfony(Packagist) = v2.0.18 No fix listed
symfony/symfony(Packagist) = v2.0.19 No fix listed
symfony/symfony(Packagist) = v2.0.20 No fix listed
symfony/symfony(Packagist) = v2.0.21 No fix listed
symfony/symfony(Packagist) = v2.0.22 No fix listed
symfony/symfony(Packagist) = v2.0.23 No fix listed
symfony/symfony(Packagist) = v2.0.24 No fix listed
symfony/symfony(Packagist) = v2.0.25 No fix listed
symfony/symfony(Packagist) = v2.0.9 No fix listed
symfony/symfony(Packagist) = v2.1.0 No fix listed
symfony/symfony(Packagist) = v2.1.0-BETA1 No fix listed
symfony/symfony(Packagist) = v2.1.0-BETA2 No fix listed
symfony/symfony(Packagist) = v2.1.0-BETA3 No fix listed
symfony/symfony(Packagist) = v2.1.0-BETA4 No fix listed
symfony/symfony(Packagist) = v2.1.0-RC1 No fix listed
symfony/symfony(Packagist) = v2.1.0-RC2 No fix listed
symfony/symfony(Packagist) = v2.1.1 No fix listed
symfony/symfony(Packagist) = v2.1.10 No fix listed
symfony/symfony(Packagist) = v2.1.11 No fix listed
symfony/symfony(Packagist) = v2.1.12 No fix listed
symfony/symfony(Packagist) = v2.1.13 No fix listed
symfony/symfony(Packagist) = v2.1.2 No fix listed
symfony/symfony(Packagist) = v2.1.3 No fix listed
symfony/symfony(Packagist) = v2.1.4 No fix listed
symfony/symfony(Packagist) = v2.1.5 No fix listed
symfony/symfony(Packagist) = v2.1.6 No fix listed
symfony/symfony(Packagist) = v2.1.7 No fix listed
symfony/symfony(Packagist) = v2.1.8 No fix listed
symfony/symfony(Packagist) = v2.1.9 No fix listed
symfony/symfony(Packagist) = v2.2.0 No fix listed
symfony/symfony(Packagist) = v2.2.0-BETA1 No fix listed
symfony/symfony(Packagist) = v2.2.0-BETA2 No fix listed
symfony/symfony(Packagist) = v2.2.0-RC1 No fix listed
symfony/symfony(Packagist) = v2.2.0-RC2 No fix listed
symfony/symfony(Packagist) = v2.2.0-RC3 No fix listed
symfony/symfony(Packagist) = v2.2.1 No fix listed
symfony/symfony(Packagist) = v2.2.10 No fix listed
symfony/symfony(Packagist) = v2.2.11 No fix listed
symfony/symfony(Packagist) = v2.2.2 No fix listed
symfony/symfony(Packagist) = v2.2.3 No fix listed
symfony/symfony(Packagist) = v2.2.4 No fix listed
symfony/symfony(Packagist) = v2.2.5 No fix listed
symfony/symfony(Packagist) = v2.2.6 No fix listed
symfony/symfony(Packagist) = v2.2.7 No fix listed
symfony/symfony(Packagist) = v2.2.8 No fix listed
symfony/symfony(Packagist) = v2.2.9 No fix listed
symfony/symfony(Packagist) = v2.3.0 No fix listed
symfony/symfony(Packagist) = v2.3.0-BETA1 No fix listed
symfony/symfony(Packagist) = v2.3.0-BETA2 No fix listed
symfony/symfony(Packagist) = v2.3.0-RC1 No fix listed
symfony/symfony(Packagist) = v2.3.1 No fix listed
symfony/symfony(Packagist) = v2.3.10 No fix listed
symfony/symfony(Packagist) = v2.3.11 No fix listed
symfony/symfony(Packagist) = v2.3.12 No fix listed
symfony/symfony(Packagist) = v2.3.13 No fix listed
symfony/symfony(Packagist) = v2.3.14 No fix listed
symfony/symfony(Packagist) = v2.3.15 No fix listed
symfony/symfony(Packagist) = v2.3.16 No fix listed
symfony/symfony(Packagist) = v2.3.17 No fix listed
symfony/symfony(Packagist) = v2.3.18 No fix listed
symfony/symfony(Packagist) = v2.3.2 No fix listed
symfony/symfony(Packagist) = v2.3.3 No fix listed
symfony/symfony(Packagist) = v2.3.4 No fix listed
symfony/symfony(Packagist) = v2.3.5 No fix listed
symfony/symfony(Packagist) = v2.3.6 No fix listed
symfony/symfony(Packagist) = v2.3.7 No fix listed
symfony/symfony(Packagist) = v2.3.8 No fix listed
symfony/symfony(Packagist) = v2.3.9 No fix listed
symfony/symfony(Packagist) >= 2.4.0, < 2.4.9 2.4.9
symfony/symfony(Packagist) = v2.4.0 No fix listed
symfony/symfony(Packagist) = v2.4.1 No fix listed
symfony/symfony(Packagist) = v2.4.2 No fix listed
symfony/symfony(Packagist) = v2.4.3 No fix listed
symfony/symfony(Packagist) = v2.4.4 No fix listed
symfony/symfony(Packagist) = v2.4.5 No fix listed
symfony/symfony(Packagist) = v2.4.6 No fix listed
symfony/symfony(Packagist) = v2.4.7 No fix listed
symfony/symfony(Packagist) = v2.4.8 No fix listed
symfony/symfony(Packagist) >= 2.5.0, < 2.5.4 2.5.4
symfony/symfony(Packagist) = v2.5.0 No fix listed
symfony/symfony(Packagist) = v2.5.1 No fix listed
symfony/symfony(Packagist) = v2.5.2 No fix listed
symfony/symfony(Packagist) = v2.5.3 No fix listed

References