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Symfony Host Header Injection

High severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Oct 6, 2023

Package

composer symfony/symfony (Composer)

Affected versions

>= 2.7.0, <= 2.7.48
>= 2.8.0, <= 2.8.43
>= 3.3.0, <= 3.3.17
>= 3.4.0, <= 3.4.13
>= 4.0.0, <= 4.0.13
>= 4.1.0, <= 4.1.2

Patched versions

2.7.49
2.8.44
3.3.18
3.4.14
4.0.14
4.1.3

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.

References

Published by the National Vulnerability Database Aug 3, 2018
Published to the GitHub Advisory Database May 14, 2022
Reviewed Jul 25, 2023
Last updated Oct 6, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS score

0.072%
(33rd percentile)

Weaknesses

CVE ID

CVE-2018-14774

GHSA ID

GHSA-66p6-7p29-55p9

Source code

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