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Deserialization of Untrusted Data in Codeigniter4

High severity GitHub Reviewed Published Jan 3, 2022 in codeigniter4/CodeIgniter4 • Updated Jan 24, 2024

Package

composer codeigniter4/framework (Composer)

Affected versions

< 4.1.6

Patched versions

4.1.6

Description

Impact

Deserialization of Untrusted Data was found in the old() function in CodeIgniter4.
Remote attackers may inject auto-loadable arbitrary objects with this vulnerability,
and possibly execute existing PHP code on the server.
We are aware of a working exploit, which can lead to SQL injection.

Patches

Upgrade to v4.1.6 or later.

Workarounds

Do not use:

  • old() and form_helper
  • RedirectResponse::withInput() and redirect()->withInput()

References

For more information

If you have any questions or comments about this advisory:

References

@MGatner MGatner published to codeigniter4/CodeIgniter4 Jan 3, 2022
Published by the National Vulnerability Database Jan 4, 2022
Reviewed Jan 6, 2022
Published to the GitHub Advisory Database Jan 6, 2022
Last updated Jan 24, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H

EPSS score

5.447%
(93rd percentile)

Weaknesses

CVE ID

CVE-2022-21647

GHSA ID

GHSA-w6jr-wj64-mc9x

Source code

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