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phpMyAdmin Authentication Bypass

Critical severity GitHub Reviewed Published May 17, 2022 to the GitHub Advisory Database • Updated Jul 31, 2023

Package

composer phpmyadmin/phpmyadmin (Composer)

Affected versions

>= 4.6, < 4.6.4
>= 4.4, < 4.4.15.8
>= 4.0, < 4.0.10.17

Patched versions

4.6.4
4.4.15.8
4.0.10.17

Description

An issue was discovered in phpMyAdmin involving the $cfg['ArbitraryServerRegexp'] configuration directive. An attacker could reuse certain cookie values in a way of bypassing the servers defined by ArbitraryServerRegexp. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

References

Published by the National Vulnerability Database Dec 11, 2016
Published to the GitHub Advisory Database May 17, 2022
Reviewed Jul 31, 2023
Last updated Jul 31, 2023

Severity

Critical

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

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(62nd percentile)

Weaknesses

No CWEs

CVE ID

CVE-2016-6629

GHSA ID

GHSA-567r-vqj7-5cw7

Source code

No known source code
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