CVE-2019-18888: Input Validation

Published Nov 13, 2019
·
Updated

An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).

Other sources

CVE-2019-18888: Prevent argument injection in a MimeTypeGuesser

Affected Software

18 affected componentsFixes available
composer/symfony/symfony>=2.0.0, <2.1.0, >=2.1.0, <2.2.0, >=2.2.0, <2.3.0, >=2.3.0, <2.4.0, >=2.4.0, <2.5.0, >=2.5.0, <2.6.0, >=2.6.0, <2.7.0, >=2.7.0, <2.8.0, >=2.8.0, <2.8.52, >=3.0.0, <3.1.0, >=3.1.0, <3.2.0, >=3.2.0, <3.3.0, >=3.3.0, <3.4.0, >=3.4.0, <3.4.35, >=4.0.0, <4.1.0, >=4.1.0, <4.2.0, >=4.2.0, <4.2.12, >=4.3.0, <4.3.8
composer/symfony/mime>=4.3.0, <4.3.8
composer/symfony/http-foundation>=2.0.0, <2.1.0, >=2.1.0, <2.2.0, >=2.2.0, <2.3.0, >=2.3.0, <2.4.0, >=2.4.0, <2.5.0, >=2.5.0, <2.6.0, >=2.6.0, <2.7.0, >=2.7.0, <2.8.0, >=2.8.0, <2.8.52, >=3.0.0, <3.1.0, >=3.1.0, <3.2.0, >=3.2.0, <3.3.0, >=3.3.0, <3.4.0, >=3.4.0, <3.4.35, >=4.0.0, <4.1.0, >=4.1.0, <4.2.0, >=4.2.0, <4.2.12, >=4.3.0, <4.3.8
composer/symfony/symfony>=4.3.0<4.3.8
4.3.8
composer/symfony/symfony>=4.0.0<4.2.12
4.2.12
composer/symfony/symfony>=3.0.0<3.4.35
3.4.35
composer/symfony/symfony>=2.0.0<2.8.52
2.8.52
composer/symfony/mime>=4.3.0<4.3.8
4.3.8
composer/symfony/http-foundation>=4.3.0<4.3.8
4.3.8
composer/symfony/http-foundation>=4.0.0<4.2.12
4.2.12
composer/symfony/http-foundation>=3.0.0<3.4.35
3.4.35
composer/symfony/http-foundation>=2.0.0<2.8.52
2.8.52
SensioLabs Symfony>=2.8.0<=2.8.50
SensioLabs Symfony>=3.4.0<=3.4.34
SensioLabs Symfony>=4.2.0<=4.2.11
SensioLabs Symfony>=4.3.0<=4.3.7
Fedoraproject Fedora=30
Fedoraproject Fedora=31

Event History

Nov 13, 2019
Advisory Published
08:00 AM
Nov 21, 2019
CVE Published
via MITRE·10:19 PM
Data Sourced
via MITRE·10:19 PM
Description

Frequently Asked Questions

1

What is CVE-2019-18888?

CVE-2019-18888 is a vulnerability that allows argument injection in a MimeTypeGuesser.

2

What software is affected by CVE-2019-18888?

The affected software includes Symfony HttpFoundation, Symfony Mime, and Symfony itself.

3

How can I fix CVE-2019-18888?

To fix CVE-2019-18888, update the affected Symfony packages to versions 2.8.53, 3.4.36, 4.2.13, or 4.3.9 or higher.

4

What is the severity of CVE-2019-18888?

The severity of CVE-2019-18888 is medium.

5

Where can I find more information about CVE-2019-18888?

More information about CVE-2019-18888 can be found at the following link: https://symfony.com/cve-2019-18888

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203