CVE-2022-36071

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    CVE-2022-36071

    Published: 2 Sept 2022Last Modified: 12 Aug 2026

    Summary: Recovery codes abuse in SFTPGo

    Details: SFTPGo is configurable SFTP server with optional HTTP/S, FTP/S and WebDAV support. SFTPGo WebAdmin and WebClient support login using TOTP (Time-based One Time Passwords) as a secondary authentication factor. Because TOTPs are often configured on mobile devices that can be lost, stolen or damaged, SFTPGo also supports recovery codes. These are a set of one time use codes that can be used instead of the TOTP. In SFTPGo versions from version 2.2.0 to 2.3.3 recovery codes can be generated before enabling two-factor authentication. An attacker who knows the user's password could potentially generate some recovery codes and then bypass two-factor authentication after it is enabled on the account at a later time. This issue has been fixed in version 2.3.4. Recovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/36xxx/CVE-2022-36071.json, https://github.com/drakkan/sftpgo/security/advisories/GHSA-54qx-8p8w-xhg8, https://nvd.nist.gov/vuln/detail/CVE-2022-36071, https://github.com/drakkan/sftpgo/issues/965

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- b6bcf0cd94fa7e87000f358350e99756f86d6418
    Fixed -df84c42e7e8a1675769fa9065b2781a6abc8ab1b

    Affected versions

    v2.3.3
    v2.3.2
    v2.3.1
    v2.3.0

    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-2022-36071 | CVE-DB