CVE-2022-39220: Github.com/drakkan/sftpgo Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-cf7g-cm7q-rq7f
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2022-39220 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Github.com/drakkan/sftpgo libraries in the Go ecosystem. The issue involves sftpgo webclient vulnerable to cross-site scripting. Remediation is available by upgrading affected packages to version 2.3.5.

CVE-2022-39220 at a Glance

CVE Identifier CVE-2022-39220
GHSA Identifier GHSA-cf7g-cm7q-rq7f
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Github.com/drakkan/sftpgo
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.1

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

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

How to Fix CVE-2022-39220

To remediate this vulnerability, upgrade all affected Github.com/drakkan/sftpgo 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 fixed: 2.3.5 
Upgrade github.com/drakkan/sftpgo to 2.3.5
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

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-39220, inspect your project dependencies for Github.com/drakkan/sftpgo:

inspect dependencies for github.com/drakkan/sftpgo

Analyze the terminal output to locate any version of Github.com/drakkan/sftpgo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.5), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Github.com/drakkan/sftpgo, 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 Cross-site scripting (XSS) vulnerabilities have been reported to affect SFTPGo WebClient. If exploited, this vulnerability allows remote attackers to inject malicious code. ### Patches Fixed in v2.3.5.

CVE-2022-39220 Affected Github.com/drakkan/sftpgo Versions

1 component(s)
Fixed Versions:
2.3.5
Product / Package Ecosystem Affected Versions Fixed Version
github.com/drakkan/sftpgo
golang/github.com/drakkan/sftpgo
Go
< 2.3.5
2.3.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/drakkan/sftpgo/security/advisories/GHSA-cf7g-cm7q-rq7f
NVD — CVE-2022-39220 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-39220
Security Fix Commit FIX COMMIT
https://github.com/drakkan/sftpgo/commit/cbef217cfa92478ee8e00ba1a5fb074f8a8aeee0
Github.com/drakkan/sftpgo Source Repository REPOSITORY
https://github.com/drakkan/sftpgo

Frequently Asked Questions

What is CVE-2022-39220?
CVE-2022-39220 is a security vulnerability in Github.com/drakkan/sftpgo involving SFTPGo WebClient vulnerable to Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Github.com/drakkan/sftpgo versions are affected?
Affected versions include releases prior to 2.3.5 across affected packages: github.com/drakkan/sftpgo.
What version fixes CVE-2022-39220?
Upgrading to 2.3.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/drakkan/sftpgo affected?
Yes, github.com/drakkan/sftpgo is affected in releases prior to 2.3.5. Upgrade your dependency to 2.3.5 or later.
What is the CVSS score of CVE-2022-39220?
CVE-2022-39220 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2022-39220?
CVE-2022-39220 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Go dependencies for CVE-2022-39220?
Run the dependency tree command: 'inspect dependencies for github.com/drakkan/sftpgo'. 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-cf7g-cm7q-rq7f",
  "modified" : "2022-09-23T17:07:44Z",
  "published" : "2022-09-20T21:22:55Z",
  "aliases" : [ "CVE-2022-39220" ],
  "summary" : "SFTPGo WebClient vulnerable to Cross-site Scripting",
  "details" : "### Impact\nCross-site scripting (XSS) vulnerabilities have been reported to affect SFTPGo WebClient. If exploited, this vulnerability allows remote attackers to inject malicious code.\n\n### Patches\nFixed in v2.3.5.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/drakkan/sftpgo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.3.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/drakkan/sftpgo/security/advisories/GHSA-cf7g-cm7q-rq7f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-39220"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/drakkan/sftpgo/commit/cbef217cfa92478ee8e00ba1a5fb074f8a8aeee0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/drakkan/sftpgo"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-09-20T21:22:55Z",
    "nvd_published_at" : "2022-09-20T22:15:00Z"
  }
}