CVE-2023-43644 - CVE House
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Status published Critical CVE-2023-43644

Improper authentication in the SOCKS5 inbound in sing-box

Vulnerability Description

Sing-box is an open source proxy system. Affected versions are subject to an authentication bypass when specially crafted requests are sent to sing-box. This affects all SOCKS5 inbounds with user authentication and an attacker may be able to bypass authentication. Users are advised to update to sing-box 1.4.4 or to 1.5.0-rc.4. Users unable to update should not expose the SOCKS5 inbound to insecure environments.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

Affected Vendor

Affected Software

sing-box
Vulnerable Versions:
< 1.4.5, >= 1.5.0-beta.1, < 1.5.0-rc.4

Timeline

Official Publish: September 25th, 2023
Last Modified: September 24th, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weaknesses (CWE)