// For flags

CVE-2021-41146

Arbitrary command execution on Windows in qutebrowser

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

qutebrowser es un navegador de código abierto centrado en el teclado con una Interfaz de Usuario Gráfica mínima. A partir de qutebrowser versión v1.7.0, el instalador de Windows para qutebrowser registra un manejador de URL "qutebrowserurl:". Con determinadas aplicaciones, la apertura de una URL "qutebrowserurl:..." especialmente diseñada puede conllevar a una ejecución de comandos de qutebrowser, lo que a su vez permite una ejecución de código arbitrario por medio de comandos como ":spawn" o ":debug-pyeval". Sólo están afectadas las instalaciones de Windows en las que qutebrowser está registrado como manejador de URL. El problema ha sido corregido en qutebrowser versión v2.4.0. La corrección también añade un refuerzo adicional para posibles problemas similares en Linux (al añadir la nueva flag --untrusted-args al archivo .desktop), aunque no se conoce ninguna vulnerabilidad de este tipo

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-09-15 CVE Reserved
  • 2021-10-21 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-09-26 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
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
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Qutebrowser
Search vendor "Qutebrowser"
 Qutebrowser
Search vendor "Qutebrowser" for product "Qutebrowser"
 <= 1.7.0
Search vendor "Qutebrowser" for product "Qutebrowser" and version " <= 1.7.0"
-
Affected
Qutebrowser
Search vendor "Qutebrowser"
 Qutebrowser
Search vendor "Qutebrowser" for product "Qutebrowser"
 >= 2.0.0 < 2.4.0
Search vendor "Qutebrowser" for product "Qutebrowser" and version " >= 2.0.0 < 2.4.0"
-
Affected