Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2021-29476

Deserialization of Untrusted Data

Published: Apr 27, 2021 | Modified: Nov 21, 2024
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-29476
CWEhttps://cwe.mitre.org/data/definitions/502.html

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.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Requests Wordpress 1.6.0 (including) 1.6.0 (including)
Requests Wordpress 1.6.1 (including) 1.6.1 (including)
Requests Wordpress 1.7.0 (including) 1.7.0 (including)
Wordpress Ubuntu bionic *
Wordpress Ubuntu focal *
Wordpress Ubuntu groovy *
Wordpress Ubuntu trusty *
Wordpress Ubuntu upstream *
Wordpress Ubuntu xenial *

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

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