GHSA-v77v-x634-9m56
Symfony vulnerable to denial of service via a malicious HTTP Host header
Quick fix
GHSA-v77v-x634-9m56 — symfony/http-foundation: upgrade to the fixed version with the command below.
composer require symfony/http-foundation:^2.3.19Details
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
Are you affected?
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Affected packages
2.0.0Fixed in: 2.3.19composer require symfony/http-foundation:^2.3.192.4.0Fixed in: 2.4.9composer require symfony/http-foundation:^2.4.92.5.0Fixed in: 2.5.4composer require symfony/http-foundation:^2.5.42.0.0Fixed in: 2.3.19composer require symfony/symfony:^2.3.192.4.0Fixed in: 2.4.9composer require symfony/symfony:^2.4.92.5.0Fixed in: 2.5.4composer require symfony/symfony:^2.5.4References
- https://github.com/symfony/symfony/pull/11828[WEB]
- https://github.com/symfony/symfony/commit/1ee96a8b1b0987ffe2a62dca7ad268bf9edfa9b8[WEB]
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2014-5244.yaml[WEB]
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2014-5244.yaml[WEB]
- https://symfony.com/blog/cve-2014-5244-denial-of-service-with-a-malicious-http-host-header[WEB]
- https://symfony.com/cve-2014-5244[WEB]