CVE-2023-43644: Missing Authentication for Critical Function

September 25, 2023 (updated September 26, 2023)

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.

References

github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g
nvd.nist.gov/vuln/detail/CVE-2023-43644

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