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Unauthenticated crypto and weak IV in Magento\Framework\Encryption

High severity GitHub Reviewed Published Nov 20, 2019 to the GitHub Advisory Database • Updated Jan 9, 2023

Package

composer magento/community-edition (Composer)

Affected versions

>= 2.0, < 2.2.6

Patched versions

2.2.6

Description

The __construct function in Framework/Encryption/Crypt.php in Magento 2 uses the PHP rand function to generate a random number for the initialization vector, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by guessing the value.

References

Reviewed Nov 19, 2019
Published to the GitHub Advisory Database Nov 20, 2019
Last updated Jan 9, 2023

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
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.345%
(72nd percentile)

Weaknesses

CVE ID

CVE-2016-6485

GHSA ID

GHSA-h7qw-mxrm-c6h2

Source code

No known source code
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