What is CVE-2021-43617?

CVE-2021-43617 is a vulnerability that allows bypassing image upload restrictions in Laravel framework versions 8.0.0 up to 8.71.0.

How does the image upload bypass vulnerability work?

The image upload bypass vulnerability in Laravel framework allows an attacker to upload malicious images by exploiting a security flaw in the upload validation process.

What is the impact of CVE-2021-43617?

The impact of CVE-2021-43617 is that it allows attackers to bypass restrictions and upload potentially malicious files, which can lead to further exploitation of the system.

How can I fix the image upload bypass vulnerability (CVE-2021-43617)?

To fix the image upload bypass vulnerability, you should upgrade your Laravel framework to a version higher than 8.71.0, or apply the patch provided by Laravel.

Where can I find more information about the image upload bypass vulnerability in Laravel framework?

More information about the image upload bypass vulnerability can be found in the GitHub pull request: https://github.com/laravel/framework/pull/39666

Vulnerability/
CVE-2021-43617

critical

9.8

CWE

434

14/11/2021

18/11/2021

21/11/2024

CVE-2021-43617: Malicious File Upload

First published: Sun Nov 14 2021(Updated: )

Image upload bypass

Credit: cve@mitre.org cve@mitre.org

Affected Software	Affected Version	How to fix
composer/laravel/framework	>=8.0.0<8.71.0
Laravel Framework	<=8.70.2
	<=8.70.2

Remedy

https://salsa.debian.org/php-team/php/-/blob/dc253886b5b2e9bc8d9e36db787abb083a667fd8/debian/php-cgi.conf#L5-6

Remedy

https://salsa.debian.org/php-team/php/-/commit/dc253886b5b2e9bc8d9e36db787abb083a667fd8

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Reference Links

Frequently Asked Questions

What is CVE-2021-43617?
CVE-2021-43617 is a vulnerability that allows bypassing image upload restrictions in Laravel framework versions 8.0.0 up to 8.71.0.
How does the image upload bypass vulnerability work?
The image upload bypass vulnerability in Laravel framework allows an attacker to upload malicious images by exploiting a security flaw in the upload validation process.
What is the impact of CVE-2021-43617?
The impact of CVE-2021-43617 is that it allows attackers to bypass restrictions and upload potentially malicious files, which can lead to further exploitation of the system.
How can I fix the image upload bypass vulnerability (CVE-2021-43617)?
To fix the image upload bypass vulnerability, you should upgrade your Laravel framework to a version higher than 8.71.0, or apply the patch provided by Laravel.
Where can I find more information about the image upload bypass vulnerability in Laravel framework?
More information about the image upload bypass vulnerability can be found in the GitHub pull request: https://github.com/laravel/framework/pull/39666

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