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Vulnerabilities / CVE-2023-43644

critical

CVE-2023-43644

sing-box vulnerable to improper authentication in the SOCKS inbound

Published Modified CWE 306
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, GHSA.

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.

Affected packages and fixed versions

SourcePackageFixed in
go::GitHub Security Advisory Gogithub.com/sagernet/sing, github.com/sagernet/sing-box0.2.12-0.20230925092853-5b05b5c147d9 and 1 more
Show all 2 entries from 1 source
SourcePackageFixed in
go::GitHub Security Advisory Gogithub.com/sagernet/sing0.2.12-0.20230925092853-5b05b5c147d9
go::GitHub Security Advisory Gogithub.com/sagernet/sing-box1.4.5, 1.5.0-rc.5

References

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.