pysec - pysec-2021-382

PYSEC-2021-382

Vulnerability from pysec - Published: 2021-10-21 18:15 - Updated: 2021-10-28 05:27

Details

qutebrowser is an open source keyboard-focused browser with a minimal GUI. Starting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers a qutebrowserurl: URL handler. With certain applications, opening a specially crafted qutebrowserurl:... URL can lead to execution of qutebrowser commands, which in turn allows arbitrary code execution via commands such as :spawn or :debug-pyeval. Only Windows installs where qutebrowser is registered as URL handler are affected. The issue has been fixed in qutebrowser v2.4.0. The fix also adds additional hardening for potential similar issues on Linux (by adding the new --untrusted-args flag to the .desktop file), though no such vulnerabilities are known.

Impacted products

Name	purl
qutebrowser	pkg:pypi/qutebrowser

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "qutebrowser",
        "purl": "pkg:pypi/qutebrowser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8f46ba3f6dc7b18375f7aa63c48a1fe461190430"
            }
          ],
          "repo": "https://github.com/qutebrowser/qutebrowser",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.0"
            },
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.0",
        "0.1.0",
        "0.1.1",
        "0.1.2",
        "0.1.3",
        "0.1.4",
        "0.10.0",
        "0.10.1",
        "0.11.0",
        "0.11.1",
        "0.2.0",
        "0.2.1",
        "0.3.0",
        "0.4.0",
        "0.4.1",
        "0.5.0",
        "0.5.1",
        "0.6.0",
        "0.6.1",
        "0.6.2",
        "0.7.0",
        "0.8.0",
        "0.8.1",
        "0.8.2",
        "0.8.3",
        "0.8.4",
        "0.9.0",
        "0.9.1",
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "1.0.3",
        "1.0.4",
        "1.1.0",
        "1.1.1",
        "1.1.2",
        "1.2.0",
        "1.2.1",
        "1.3.0",
        "1.3.1",
        "1.3.2",
        "1.3.3",
        "1.4.0",
        "1.4.1",
        "1.4.2",
        "1.5.0",
        "1.5.1",
        "1.5.2",
        "1.6.0",
        "1.6.1",
        "1.6.2",
        "1.6.3",
        "1.7.0",
        "2.0.0",
        "2.0.1",
        "2.0.2",
        "2.1.0",
        "2.1.1",
        "2.2.0",
        "2.2.1",
        "2.2.2",
        "2.2.3",
        "2.3.0",
        "2.3.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2021-41146",
    "GHSA-vw27-fwjf-5qxm"
  ],
  "details": "qutebrowser is an open source keyboard-focused browser with a minimal GUI. Starting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers a `qutebrowserurl:` URL handler. With certain applications, opening a specially crafted `qutebrowserurl:...` URL can lead to execution of qutebrowser commands, which in turn allows arbitrary code execution via commands such as `:spawn` or `:debug-pyeval`. Only Windows installs where qutebrowser is registered as URL handler are affected. The issue has been fixed in qutebrowser v2.4.0. The fix also adds additional hardening for potential similar issues on Linux (by adding the new --untrusted-args flag to the .desktop file), though no such vulnerabilities are known.",
  "id": "PYSEC-2021-382",
  "modified": "2021-10-28T05:27:07.120992Z",
  "published": "2021-10-21T18:15:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/qutebrowser/qutebrowser/security/advisories/GHSA-vw27-fwjf-5qxm"
    },
    {
      "type": "FIX",
      "url": "https://github.com/qutebrowser/qutebrowser/commit/8f46ba3f6dc7b18375f7aa63c48a1fe461190430"
    }
  ]
}

CVE-2021-41146 (GCVE-0-2021-41146)

Vulnerability from cvelistv5 – Published: 2021-10-21 17:35 – Updated: 2024-08-04 02:59

Summary

qutebrowser is an open source keyboard-focused browser with a minimal GUI. Starting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers a `qutebrowserurl:` URL handler. With certain applications, opening a specially crafted `qutebrowserurl:...` URL can lead to execution of qutebrowser commands, which in turn allows arbitrary code execution via commands such as `:spawn` or `:debug-pyeval`. Only Windows installs where qutebrowser is registered as URL handler are affected. The issue has been fixed in qutebrowser v2.4.0. The fix also adds additional hardening for potential similar issues on Linux (by adding the new --untrusted-args flag to the .desktop file), though no such vulnerabilities are known.

Severity ?

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CWE-641 - Improper Restriction of Names for Files and Other Resources

Assigner

GitHub_M

References

URL

Tags

	https://github.com/qutebrowser/qutebrowser/securi…	x_refsource_CONFIRM
	https://github.com/qutebrowser/qutebrowser/commit…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	qutebrowser	qutebrowser	Affected: >= 1.7.0, < 2.4.0

Show details on NVD website

JSON

To clipboard

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GHSA-VW27-FWJF-5QXM

Vulnerability from github – Published: 2021-10-22 16:20 – Updated: 2024-10-16 20:48

Summary

Arbitrary command execution on Windows via qutebrowserurl: URL handler

Details

Impact

Starting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers it as a handler for certain URL schemes. With some applications such as Outlook Desktop, opening a specially crafted URL can lead to argument injection, allowing execution of qutebrowser commands, which in turn allows arbitrary code execution via commands such as :spawn or :debug-pyeval.

Only Windows installs where qutebrowser is registered as URL handler are affected. It does not have to be set as default browser for the exploit to work.

Patches

The issue has been fixed in qutebrowser v2.4.0 in commit 8f46ba3f6dc7b18375f7aa63c48a1fe461190430.

The fix also adds additional hardening for potential similar issues on Linux (by adding the new --untrusted-args flag to the .desktop file), though no such vulnerabilities are known.

Backported patches for older versions are available, but no further releases are planned:

v1.7.x: d1ceaab
v1.8.x: ca7155d
v1.9.x: 157d871
v1.10.x: 94a6125
v1.11.x: 10acfbb
v1.12.x: 363a18f
v1.13.x: 410f262
v1.14.x: e4f4d93
v2.0.x: 15a1654
v2.1.x: 509ddf2
v2.2.x: 03dcba5
v2.3.x: 00a694c

(commits are referring to qutebrowser/qutebrowser on GitHub)

Workarounds

Remove qutebrowser from the default browser settings entirely, so that it does not handle any kind of URLs. Make sure to remove all handlers, including an (accidental) qutebrowserURL handler, e.g. using NirSoft URLProtocolView.

Timeline

2021-10-15: Issue reported via security@qutebrowser.org by Ping Fan (Zetta) Ke of Valkyrie-X Security Research Group (VXRL) 2021-10-15: Issue confirmed by @The-Compiler (lead developer), author of installer (@bitraid) contacted for help/review 2021-10-15: CVE assigned by GitHub 2021-10-15 to 2021-10-17: Fix developed 2021-10-17: Additional core developer (@toofar) contacted for help/review 2021-10-21: v2.4.0 released containing the fix 2021-10-21: Advisory and fix published

References

See the commit message for additional information and references to various similar issues in other projects.

Acknowledgements

Thanks to Ping Fan (Zetta) Ke of Valkyrie-X Security Research Group (VXRL/@vxresearch) for finding and responsibly disclosing this issue.

Contact

If you have any questions or comments about this advisory, please email security@qutebrowser.org.

Severity ?

8.8 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "qutebrowser"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.7.0"
            },
            {
              "fixed": "2.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-41146"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-641",
      "CWE-77",
      "CWE-88"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-10-21T20:46:42Z",
    "nvd_published_at": "2021-10-21T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nStarting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers it as a handler for certain URL schemes. With some applications such as Outlook Desktop, opening a specially crafted URL can lead to argument injection, allowing execution of qutebrowser commands, which in turn allows arbitrary code execution via commands such as `:spawn` or `:debug-pyeval`.\n\nOnly Windows installs where qutebrowser is registered as URL handler are affected. It does *not* have to be set as default browser for the exploit to work.\n\n### Patches\nThe issue has been fixed in [qutebrowser v2.4.0](https://github.com/qutebrowser/qutebrowser/releases/tag/v2.4.0) in commit 8f46ba3f6dc7b18375f7aa63c48a1fe461190430.\n\nThe fix also adds additional hardening for potential similar issues on Linux (by adding the new `--untrusted-args` flag to the `.desktop` file), though no such vulnerabilities are known.\n\nBackported patches for older versions are available, but no further releases are planned:\n\n- v1.7.x: d1ceaab\n- v1.8.x: ca7155d\n- v1.9.x: 157d871\n- v1.10.x: 94a6125\n- v1.11.x: 10acfbb\n- v1.12.x: 363a18f\n- v1.13.x: 410f262\n- v1.14.x: e4f4d93\n- v2.0.x: 15a1654\n- v2.1.x: 509ddf2\n- v2.2.x: 03dcba5\n- v2.3.x: 00a694c\n\n(commits are referring to qutebrowser/qutebrowser on GitHub)\n\n### Workarounds\nRemove qutebrowser from the default browser settings entirely, so that it does not handle any kind of URLs. Make sure to remove *all* handlers, including an (accidental) `qutebrowserURL` handler, e.g. using [NirSoft URLProtocolView](https://www.nirsoft.net/utils/url_protocol_view.html).\n\n### Timeline\n2021-10-15: Issue reported via security@qutebrowser.org by Ping Fan (Zetta) Ke of [Valkyrie-X Security Research Group (VXRL)](https://www.vxrl.hk/)\n2021-10-15: Issue confirmed by @The-Compiler (lead developer), author of installer (@bitraid) contacted for help/review\n2021-10-15: CVE assigned by GitHub\n2021-10-15 to 2021-10-17: Fix developed\n2021-10-17: Additional core developer (@toofar) contacted for help/review\n2021-10-21: v2.4.0 released containing the fix\n2021-10-21: Advisory and fix published\n\n### References\nSee the [commit message](https://github.com/qutebrowser/qutebrowser/commit/8f46ba3f6dc7b18375f7aa63c48a1fe461190430) for additional information and references to various similar issues in other projects.\n\n### Acknowledgements\nThanks to Ping Fan (Zetta) Ke of [Valkyrie-X Security Research Group](https://www.vxrl.hk/) (VXRL/@vxresearch) for finding and responsibly disclosing this issue.\n\n### Contact\nIf you have any questions or comments about this advisory, please email [security@qutebrowser.org](mailto:security@qutebrowser.org).",
  "id": "GHSA-vw27-fwjf-5qxm",
  "modified": "2024-10-16T20:48:13Z",
  "published": "2021-10-22T16:20:10Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/qutebrowser/qutebrowser/security/advisories/GHSA-vw27-fwjf-5qxm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41146"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qutebrowser/qutebrowser/commit/8f46ba3f6dc7b18375f7aa63c48a1fe461190430"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/qutebrowser/PYSEC-2021-382.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/qutebrowser/qutebrowser"
    }
  ],
  "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:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Arbitrary command execution on Windows via qutebrowserurl: URL handler"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

PYSEC-2021-382

CVE-2021-41146 (GCVE-0-2021-41146)

GHSA-VW27-FWJF-5QXM

Impact

Patches

Workarounds

Timeline

References

Acknowledgements

Contact

Tags

Sightings

Nomenclature