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Improper authentication in the SOCKS inbound

Critical
nekohasekai published GHSA-r5hm-mp3j-285g Sep 25, 2023

Package

gomod github.com/sagernet/sing-box (Go)

Affected versions

< 1.5.0-rc.5

Patched versions

1.4.5

Description

Impact

This vulnerability allows specially crafted requests to bypass authentication, affecting all SOCKS inbounds with user authentication.

Patches

Update to sing-box 1.4.5 or 1.5.0-rc.5 and later versions.

Workarounds

Don't expose the SOCKS5 inbound to insecure environments.

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
None
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:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVE ID

CVE-2023-43644

Weaknesses