CVE-2021-41267: Webcache Poisoning in Symfony
First published: Sat Oct 09 2021(Updated: )
CVE-2021-41267: Webcache Poisoning via X-Forwarded-Prefix and sub-request
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/symfony/http-kernel | >=5.2.0<5.3.0>=5.3.0<5.3.12 | |
| composer/symfony/symfony | >=5.2.0<5.3.0>=5.3.0<5.3.12 | |
| SensioLabs Symfony | >=5.2.0<5.3.12 | |
| composer/symfony/symfony | >=5.2.0<5.3.12 | 5.3.12 |
| composer/symfony/http-kernel | >=5.2.0<5.3.12 | 5.3.12 |
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Reference Links
- https://symfony.com/cve-2021-41267
- https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487
- https://github.com/symfony/symfony/pull/44243
- https://github.com/symfony/symfony/releases/tag/v5.3.12
- https://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2q
- https://nvd.nist.gov/vuln/detail/CVE-2021-41267
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2021-41267.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2021-41267.yaml
- https://github.com/advisories/GHSA-q3j3-w37x-hq2q (Advisory)
Frequently Asked Questions
What is CVE-2021-41267?
CVE-2021-41267 is a vulnerability that allows web cache poisoning through the X-Forwarded-Prefix header and sub-requests.
What software is affected by CVE-2021-41267?
CVE-2021-41267 affects the Symfony HttpKernel library version 5.2.0 up to 5.3.12.
How can I fix CVE-2021-41267?
To fix CVE-2021-41267, it is recommended to upgrade the affected Symfony HttpKernel library to version 5.3.13 or higher.
Where can I find more information about CVE-2021-41267?
You can find more information about CVE-2021-41267 on the Symfony website at https://symfony.com/cve-2021-41267.
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