CVE-2023-27582

Full authentication bypass if SASL authorization username is specified

Published Mar 13, 2023 CVSS 3.1 · 9.1 Critical EPSS 1.0% KEV · Not listed
Description
maddy is a composable, all-in-one mail server. Starting with version 0.2.0 and prior to version 0.6.3, maddy allows a full authentication bypass if SASL authorization username is specified when using the PLAIN authentication mechanisms. Instead of validating the specified username, it is accepted as is after checking the credentials for the authentication username. maddy 0.6.3 includes the fix for the bug. There are no known workarounds.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-0863 maddy is a composable, all-in-one mail server. Starting with version 0.2.0 and prior to version 0.6.3, maddy allows a full authentication bypass if SASL authorization username is specified when using the PLAIN authentication mechanisms. Instead of validating the specified username, it is accepted as is after checking the credentials for the authentication username. maddy 0.6.3 includes the fix for the bug. There are no known workarounds.
Github GHSA Github GHSA GHSA-4g76-w3xw-2x6w Full authentication bypass if SASL authorization username is specified
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Feb 25, 2025, 2:58 PM
Reserved
Mar 4, 2023, 1:03 AM
Status
Modified
Published
Mar 13, 2023, 10:15 PM
Modified
Jun 17, 2026, 5:45 AM