CVE-2021-41146

Arbitrary command execution on Windows in qutebrowser

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.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.89% Top 30%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: qutebrowser qutebrowser
Published at:
Updated at:

References

Link Tags
https://github.com/qutebrowser/qutebrowser/security/advisories/GHSA-vw27-fwjf-5qxm third party advisory
https://github.com/qutebrowser/qutebrowser/commit/8f46ba3f6dc7b18375f7aa63c48a1fe461190430 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-41146?
CVE-2021-41146 has been scored as a high severity vulnerability.
How to fix CVE-2021-41146?
To fix CVE-2021-41146, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-41146 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-41146 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41146?
CVE-2021-41146 affects qutebrowser qutebrowser.
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