CVE-2021-41146

Arbitrary command execution on Windows in qutebrowser

State: Published
Severity: 8.8 High
Published: Oct 21, 2021
Updated: Aug 4, 2024
Reserved: Sep 15, 2021

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
qutebrowserqutebrowser	>= 1.7.0, < 2.4.0Affected

References

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