CVE-2022-36071: Github.com/drakkan/sftpgo/v2 SFTPGo Vulnerable To Recovery Codes Vulnerability

HIGH
Advisory Identifier: GHSA-54qx-8p8w-xhg8
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CVSS 8.3
CWE-287 CWE-916
Published
Advisory Summary

CVE-2022-36071 is a HIGH (CVSS 8.3) sftpgo vulnerable to recovery codes vulnerability (CWE-287: Improper Authentication) affecting Github.com/drakkan/sftpgo/v2 libraries in the Go ecosystem. The issue involves sftpgo vulnerable to recovery codes abuse. Remediation is available by upgrading affected packages to version 2.3.4.

CVE-2022-36071 at a Glance

CVE Identifier CVE-2022-36071
GHSA Identifier GHSA-54qx-8p8w-xhg8
Severity HIGH
CVSS v3.1 Base Score 8.3
CWE Classification CWE-287: Improper Authentication
Affected Product Github.com/drakkan/sftpgo/v2
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 8.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability Low (A:L)

How to Fix CVE-2022-36071

To remediate this vulnerability, upgrade all affected Github.com/drakkan/sftpgo/v2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/drakkan/sftpgo/v2 fixed: 2.3.4 
Upgrade github.com/drakkan/sftpgo/v2 to 2.3.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/drakkan/sftpgo/v2

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-36071, inspect your project dependencies for Github.com/drakkan/sftpgo/v2:

inspect dependencies for github.com/drakkan/sftpgo/v2

Analyze the terminal output to locate any version of Github.com/drakkan/sftpgo/v2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Github.com/drakkan/sftpgo/v2, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact SFTPGo WebAdmin and WebClient support login using TOTP (Time-based One Time Passwords) as a seconday 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 v2.2.0 to v2.3.3 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. ### Patches Fixed in v2.3.4. Recovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it. ### Workarounds Regenerate recovery codes after enabling two-factor authentication. ### References https://github.com/drakkan/sftpgo/issues/965

CVE-2022-36071 Affected Github.com/drakkan/sftpgo/v2 Versions

1 component(s)
Fixed Versions:
2.3.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/drakkan/sftpgo/v2
golang/github.com/drakkan/sftpgo/v2
Go
≥ 2.2.0
< 2.3.4
2.3.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/drakkan/sftpgo/security/advisories/GHSA-54qx-8p8w-xhg8
NVD — CVE-2022-36071 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-36071
Github.com/drakkan/sftpgo/v2 Source Repository REPOSITORY
https://github.com/drakkan/sftpgo/issues/965
Github.com/drakkan/sftpgo/v2 Source Repository REPOSITORY
https://github.com/drakkan/sftpgo

Frequently Asked Questions

What is CVE-2022-36071?
CVE-2022-36071 is a security vulnerability in Github.com/drakkan/sftpgo/v2 involving SFTPGo vulnerable to recovery codes abuse under CWE-287: Improper Authentication.
Which Github.com/drakkan/sftpgo/v2 versions are affected?
Affected versions include releases prior to 2.3.4 across affected packages: github.com/drakkan/sftpgo/v2.
What version fixes CVE-2022-36071?
Upgrading to 2.3.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/drakkan/sftpgo/v2 affected?
Yes, github.com/drakkan/sftpgo/v2 is affected in releases prior to 2.3.4. Upgrade your dependency to 2.3.4 or later.
What is the CVSS score of CVE-2022-36071?
CVE-2022-36071 has a CVSS v3.1 base score of 8.3 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.
What CWE is associated with CVE-2022-36071?
CVE-2022-36071 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check Go dependencies for CVE-2022-36071?
Run the dependency tree command: 'inspect dependencies for github.com/drakkan/sftpgo/v2'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-54qx-8p8w-xhg8",
  "modified" : "2022-09-16T21:05:28Z",
  "published" : "2022-09-16T21:05:28Z",
  "aliases" : [ "CVE-2022-36071" ],
  "summary" : "SFTPGo vulnerable to recovery codes abuse",
  "details" : "### Impact\n\nSFTPGo WebAdmin and WebClient support login using TOTP (Time-based One Time Passwords) as a seconday 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.\n\nIn SFTPGo versions from v2.2.0 to v2.3.3 recovery codes can be generated before enabling two-factor authentication.\nAn 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.\n\n### Patches\n\nFixed in v2.3.4.\nRecovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it.\n\n### Workarounds\n\nRegenerate recovery codes after enabling two-factor authentication.\n\n### References\n\nhttps://github.com/drakkan/sftpgo/issues/965\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/drakkan/sftpgo/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2.0"
      }, {
        "fixed" : "2.3.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/drakkan/sftpgo/security/advisories/GHSA-54qx-8p8w-xhg8"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-36071"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/drakkan/sftpgo/issues/965"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/drakkan/sftpgo"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287", "CWE-916" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-09-16T21:05:28Z",
    "nvd_published_at" : "2022-09-02T18:15:00Z"
  }
}