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CVE-2021-29476

Date: April 27, 2021

Requests is a HTTP library written in PHP. Requests mishandles deserialization in FilteredIterator. The issue has been patched and users of "Requests" 1.6.0, 1.6.1 and 1.7.0 should update to version 1.8.0.

Language: PHP

Severity Score

Related Resources (15)

https://medium.com/@knownsec404team/extend-the-attack-surface-of-php-deserialization-vulnerability-via-phar-d6455c6a1066#3c0f
https://github.com/WordPress/Requests/security/advisories/GHSA-52qp-jpq7-6c54
https://github.com/FriendsOfPHP/security-advisories/blob/master/rmccue/requests/CVE-2021-29476.yaml
https://github.com/WordPress/wordpress-develop/commit/add6bedf3a53b647d0ebda2970057912d3cd79d3
https://github.com/rmccue/Requests/pull/421
https://cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-....pdf
https://github.com/ambionics/phpggc/issues/52
https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release
https://dannewitz.ninja/posts/php-unserialize-object-injection-yet-another-stars-rating-wordpress
https://i.blackhat.com/us-18/Thu-August-9/us-18-Thomas-Its-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-Know-It.pdf
https://nvd.nist.gov/vuln/detail/CVE-2021-29476
https://blog.detectify.com/2019/07/23/improving-wordpress-plugin-security
https://2018.zeronights.ru/wp-content/uploads/materials/9%20ZN2018%20WV%20-%20PHP%20unserialize.pdf
https://security-tracker.debian.org/tracker/CVE-2021-29476
https://www.mend.io/vulnerability-database/CVE-2021-29476

Severity Score

Weakness Type (CWE)

Deserialization of Untrusted Data

CWE-502

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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