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MD5 support in auth.shadow

Low
foxcpp published GHSA-qh54-9vc5-m9fg Oct 11, 2021

Package

gomod github.com/foxcpp/maddy (Go)

Affected versions

0.5,0.5.1

Patched versions

0.5.2

Description

Impact

This vulnerability affects maddy 0.5.1, 0.5.0 users using auth.shadow module
and an extremely outdated system that still allows MD5 hashes in
/etc/shadows.

Patches

Patch is available as part of the 0.5.2 release.

Workarounds

Ensure MD5 hashes are not present in /etc/shadow.

Severity

Low

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
Local
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
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:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

CVE ID

CVE-2021-42583

Weaknesses