CVE-2021-41146 Arbitrary command execution on Windows in qutebrowser

2021-10-2117:35:10

CWE-88

CWE-77

CWE-641

GitHub_M

www.cve.org

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.3 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.9%

JSON

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.

CNA Affected

[
  {
    "product": "qutebrowser",
    "vendor": "qutebrowser",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.7.0, < 2.4.0"
      }
    ]
  }
]