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Vulnerability details: VCID-jyf2-9f7g-n7d1
Vulnerability ID VCID-jyf2-9f7g-n7d1
Aliases CVE-2014-5244
GHSA-v77v-x634-9m56
Summary Symfony vulnerable to denial of service via a malicious HTTP Host header 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
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1333 Inefficient Regular Expression Complexity
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-v77v-x634-9m56
cvssv3.1 7.5 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2014-5244.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2014-5244.yaml
cvssv3.1 7.5 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2014-5244.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2014-5244.yaml
cvssv3.1 7.5 https://github.com/symfony/symfony/commit/1ee96a8b1b0987ffe2a62dca7ad268bf9edfa9b8
generic_textual HIGH https://github.com/symfony/symfony/commit/1ee96a8b1b0987ffe2a62dca7ad268bf9edfa9b8
cvssv3.1 7.5 https://github.com/symfony/symfony/pull/11828
generic_textual HIGH https://github.com/symfony/symfony/pull/11828
cvssv3.1 7.5 https://symfony.com/blog/cve-2014-5244-denial-of-service-with-a-malicious-http-host-header
generic_textual HIGH https://symfony.com/blog/cve-2014-5244-denial-of-service-with-a-malicious-http-host-header
cvssv3.1 7.5 https://symfony.com/cve-2014-5244
generic_textual HIGH https://symfony.com/cve-2014-5244
Reference id Reference type URL
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2014-5244.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2014-5244.yaml
https://github.com/symfony/symfony/commit/1ee96a8b1b0987ffe2a62dca7ad268bf9edfa9b8
https://github.com/symfony/symfony/pull/11828
https://symfony.com/blog/cve-2014-5244-denial-of-service-with-a-malicious-http-host-header
https://symfony.com/cve-2014-5244
GHSA-v77v-x634-9m56 https://github.com/advisories/GHSA-v77v-x634-9m56
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2014-5244.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2014-5244.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/symfony/symfony/commit/1ee96a8b1b0987ffe2a62dca7ad268bf9edfa9b8
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/symfony/symfony/pull/11828
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://symfony.com/blog/cve-2014-5244-denial-of-service-with-a-malicious-http-host-header
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://symfony.com/cve-2014-5244
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2025-07-01T12:11:40.956628+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/05/GHSA-v77v-x634-9m56/GHSA-v77v-x634-9m56.json 36.1.3