GHSA-2FQM-M4R2-FH98

Vulnerability from github – Published: 2023-06-06 16:46 – Updated: 2023-06-06 16:46
VLAI?
Summary
kiwitcms vulnerable to stored cross-site scripting via unrestricted file upload
Details

Impact

Kiwi TCMS allows users to upload attachments to test plans, test cases, etc. Earlier versions of Kiwi TCMS had introduced upload validators in order to prevent potentially dangerous files from being uploaded and Content-Security-Policy definition to prevent cross-site-scripting attacks.

The upload validation checks were not 100% robust which left the possibility to circumvent them and upload a potentially dangerous file which allows execution of arbitrary JavaScript in the browser. Additionally we've discovered that Nginx's proxy_pass directive will strip some headers negating protections built into Kiwi TCMS when served behind a reverse proxy.

Patches

  • Improved file upload validation code
  • Updated Nginx reverse proxy configuration for *.tenant.kiwitcms.org

Workarounds

If serving Kiwi TCMS behind a reverse proxy make sure that additional header values are still passed to the client browser. If they aren't redefine them inside the proxy configuration. See etc/nginx.conf#L66-L68 and etc/nginx.conf#L87

References

Disclosed by M Nadeem Qazi.

Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 12.3"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "kiwitcms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-33977"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-434",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-06T16:46:16Z",
    "nvd_published_at": "2023-06-06T19:15:12Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nKiwi TCMS allows users to upload attachments to test plans, test cases, etc. Earlier versions of Kiwi TCMS had introduced upload validators in order to prevent potentially dangerous files from being uploaded and Content-Security-Policy definition to prevent cross-site-scripting attacks. \n\nThe upload validation checks were not 100% robust which left the possibility to circumvent them and upload a potentially dangerous file which allows execution of arbitrary JavaScript in the browser. Additionally we\u0027ve discovered that Nginx\u0027s `proxy_pass` directive will strip some headers negating protections built into Kiwi TCMS when served behind a reverse proxy.\n\n### Patches\n\n- Improved file upload validation code\n- Updated Nginx reverse proxy configuration for ***.tenant.kiwitcms.org**\n\n### Workarounds\n\nIf serving Kiwi TCMS behind a reverse proxy make sure that additional header values are still passed to the client browser. If they aren\u0027t redefine them inside the proxy configuration. See [etc/nginx.conf#L66-L68](https://github.com/kiwitcms/Kiwi/blob/master/etc/nginx.conf#L66-L68) and [etc/nginx.conf#L87](https://github.com/kiwitcms/Kiwi/blob/master/etc/nginx.conf#L87)\n\n### References\n\nDisclosed by [M Nadeem Qazi](https://huntr.dev/bounties/6aea9a26-e29a-467b-aa5a-f767f0c2ec96/).",
  "id": "GHSA-2fqm-m4r2-fh98",
  "modified": "2023-06-06T16:46:16Z",
  "published": "2023-06-06T16:46:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kiwitcms/Kiwi/security/advisories/GHSA-2fqm-m4r2-fh98"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-33977"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kiwitcms/kiwi/commit/d789f4b51025de4f8c747c037d02e1b0da80b034"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kiwitcms/Kiwi"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kiwitcms/Kiwi/blob/master/etc/nginx.conf#L66-L68"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kiwitcms/Kiwi/blob/master/etc/nginx.conf#L87"
    },
    {
      "type": "WEB",
      "url": "https://huntr.dev/bounties/6aea9a26-e29a-467b-aa5a-f767f0c2ec96"
    },
    {
      "type": "WEB",
      "url": "https://kiwitcms.org/blog/kiwi-tcms-team/2023/06/06/kiwi-tcms-124"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kiwitcms vulnerable to stored cross-site scripting via unrestricted file upload"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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