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See #6857
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Removed in https://github.com/PyCQA/pylint/pull/3571 - should use black instead
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See #6857 and https://github.com/PyCQA/pylint/issues/5342
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- Hide radio button using the property `-webkit-appearance: none;`
instead of `opacity`
- It is also supported on older QtWebEngine version 5.12
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By default numbers are interpreted as counts for bindings. Making this
behavior configurable allows for emacs-like bindings, where number keys
are passed through.
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- Replace JS function with Jinja `if` statement
- Delete string displaying current setting
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Not needed after e2a07148e16b69562e28d196768890224a892df9.
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The following commit contains updates of CSS and a bit of JS:
- font update
- lists are represented as buttons
- color update
- buttons work with f hint search
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Correctly send the 'wrap' argument to the helper method
WebKitSearch._args_to_flags() instead of sending 'reverse' for a second
time.
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Reset flags when the user searches for the same text multiple times,
instead of completely ignoring it.
This fixes an issue where searching forward, and then searching backward
for the same text, would not reset the search direction.
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Add an optional boolean argument to `tabbed_browser.close_tab()` called
`transfer` which indicates whether the tab is closing as a result of
being given to another window (`tab-give`) or taken by another window
(`tab-take`). If so, the tab will always close, even if it is the last
tab in the window and `tabs.last_close` is not set to 'close'.
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Seems to be still needed, at least on macOS. Otherwise, we get a
NotADirectoryError trying to load resources from a weird path under the
qutebrowser executable.
See #6792
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See #6792 and https://github.com/pyinstaller/pyinstaller/issues/1905 (fixed in
PyInstaller 4.4)
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See https://www.reddit.com/r/qutebrowser/comments/qirb5k/editor_gvim_failed_to_start_execpv_no_such_file/
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Speculative fix for issue reported by a macOS user: https://crashes.qutebrowser.org/lists?search=NullWriter
See https://github.com/pyinstaller/pyinstaller/issues/4481
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On Windows, if an application is registered as an URL handler like this:
HKEY_CLASSES_ROOT
https
URL Protocol = ""
[...]
shell
open
command
(Default) = ".../qutebrowser.exe" "%1"
one would think that Windows takes care of making sure URLs can't inject
arguments by containing a quote. However, this is not the case, as
stated by the Microsoft docs:
https://docs.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/platform-apis/aa767914(v=vs.85)
Security Warning: Applications that handle URI schemes must consider how to
respond to malicious data. Because handler applications can receive data
from untrusted sources, the URI and other parameter values passed to the
application may contain malicious data that attempts to exploit the handling
application.
and
As noted above, the string that is passed to a pluggable protocol handler
might be broken across multiple parameters. Malicious parties could use
additional quote or backslash characters to pass additional command line
parameters. For this reason, pluggable protocol handlers should assume that
any parameters on the command line could come from malicious parties, and
carefully validate them. Applications that could initiate dangerous actions
based on external data must first confirm those actions with the user. In
addition, handling applications should be tested with URIs that are overly
long or contain unexpected (or undesirable) character sequences.
Indeed it's trivial to pass a command to qutebrowser this way - given how
trivial the exploit is to recreate given the information above, here's a PoC:
https:x" ":spawn calc
(or qutebrowserurl: instead of https: if qutebrowser isn't registered as a
default browser)
Some applications do escape the quote characters before calling
qutebrowser - but others, like Outlook Desktop or .url files, do not.
As a fix, we add an --untrusted-args flag and some early validation of the raw
sys.argv, before parsing any arguments or e.g. creating a QApplication (which
might already allow injecting Qt flags there).
We assume that there's no way for an attacker to inject flags *before* the %1
placeholder in the registry, and add --untrusted-args as the last argument of
the registry entry. This way, it'd still be possible for users to customize
their invocation flags without having to remove --untrusted-args.
After --untrusted-args, however, we have some rather strict checks:
- There should be zero or one arguments, but not two (or more)
- Any argument may not start with - (flag) or : (qutebrowser command)
We also add the --untrusted-args flag to the Linux .desktop file, though it
should not be needed there, as the specification there is sane:
https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#exec-variables
Implementations must take care not to expand field codes into multiple
arguments unless explicitly instructed by this specification. This means
that name fields, filenames and other replacements that can contain spaces
must be passed as a single argument to the executable program after
expansion.
There is no comparable mechanism on macOS, which opens the application without
arguments and then sends an "open" event to it:
https://doc.qt.io/qt-5/qfileopenevent.html
This issue was introduced in qutebrowser v1.7.0 which started registering it as
URL handler: baee2888907b260881d5831c68500941937261a0 / #4086
This is by no means an issue isolated to qutebrowser. Many other projects have
had similar trouble with Windows' rather unexpected behavior:
Electron / Exodus Bitcoin wallet:
- http://web.archive.org/web/20190702112128/https://medium.com/0xcc/electrons-bug-shellexecute-to-blame-cacb433d0d62
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000006
- https://medium.com/hackernoon/exploiting-electron-rce-in-exodus-wallet-d9e6db13c374
IE/Firefox:
- https://bugzilla.mozilla.org/show_bug.cgi?id=384384
- https://bugzilla.mozilla.org/show_bug.cgi?id=1572838
Others:
- http://web.archive.org/web/20210930203632/https://www.vdoo.com/blog/exploiting-custom-protocol-handlers-in-windows
- https://parsiya.net/blog/2021-03-17-attack-surface-analysis-part-2-custom-protocol-handlers/
- etc. etc.
See CVE-2021-41146 / GHSA-vw27-fwjf-5qxm:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41146
https://github.com/qutebrowser/qutebrowser/security/advisories/GHSA-vw27-fwjf-5qxm
Thanks to Ping Fan (Zetta) Ke of Valkyrie-X Security Research Group
(VXRL/@vxresearch) for finding and responsibly disclosing this issue.
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Based on the Greasemonkey implementation:
https://github.com/greasemonkey/greasemonkey/blob/4.11/src/bg/api-provider-source.js#L232-L249
Needed by e.g. this script to work at all:
https://greasyfork.org/en/scripts/394820-mouseover-popup-image-viewer
(cherry picked from commit 1bea82698153ba3e20529e010bc3f254b9904231)
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Co-authored-by: Florian Bruhin <me@the-compiler.org>
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