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Symfony HTTP Foundation web cache poisoning

Moderate severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Feb 8, 2024

Package

composer symfony/http-foundation (Composer)

Affected versions

>= 2.7.0, < 2.7.49
>= 2.8.0, < 2.8.44
>= 3.0.0, < 3.3.18
>= 3.4.0, < 3.4.14
>= 4.0.0, < 4.0.14
>= 4.1.0, < 4.1.3

Patched versions

2.7.49
2.8.44
3.3.18
3.4.14
4.0.14
4.1.3
composer symfony/symfony (Composer)
>= 2.7.0, < 2.7.49
>= 2.8.0, < 2.8.44
>= 3.0.0, < 3.3.18
>= 3.4.0, < 3.4.14
>= 4.0.0, < 4.0.14
>= 4.1.0, < 4.1.3
2.7.49
2.8.44
3.3.18
3.4.14
4.0.14
4.1.3

Description

An issue was discovered in Http Foundation 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. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.

References

Published by the National Vulnerability Database Aug 3, 2018
Published to the GitHub Advisory Database May 13, 2022
Reviewed Feb 22, 2023
Last updated Feb 8, 2024

Severity

Moderate

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS score

87.778%
(99th percentile)

Weaknesses

CVE ID

CVE-2018-14773

GHSA ID

GHSA-8wgj-6wx8-h5hq

Source code

No known source code

Credits

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