CVE-2023-43644

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    CVE-2023-43644

    Published: 25 Sept 2023Last Modified: 12 Aug 2026

    Summary: Improper authentication in the SOCKS5 inbound in sing-box

    Details: 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: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43644.json, https://github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g, https://nvd.nist.gov/vuln/detail/CVE-2023-43644

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -e57207a1bcf9d69a491363e1491dd0a37c2f69a0

    Affected versions

    v1.4.4
    v1.4.3
    v1.4.2
    v1.4.1
    v1.4.0
    v1.4.0-rc.3
    v1.4.0-rc.1
    v1.4.0-beta.6

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2023-43644 | CVE-DB