<table><tr><td style="">croick added a comment.
</td><a style="text-decoration: none; padding: 4px 8px; margin: 0 8px 8px; float: right; color: #464C5C; font-weight: bold; border-radius: 3px; background-color: #F7F7F9; background-image: linear-gradient(to bottom,#fff,#f1f0f1); display: inline-block; border: 1px solid rgba(71,87,120,.2);" href="https://phabricator.kde.org/D11236">View Revision</a></tr></table><br /><div><div><blockquote style="border-left: 3px solid #8C98B8;
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<div style="font-style: normal;
padding-bottom: 4px;">In <a href="https://phabricator.kde.org/D11236#239055" style="background-color: #e7e7e7;
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color: rgb(107, 116, 140);"><p>Maybe I am missing something here but wouldn't this allow any application to get ptrace access?</p>
<p>e.g. if a malicious program watches /tmp/kcrash_*, then writes its own pid to a new socket before kcrash writes the debugger's... now the malicious program has ptrace access.</p></div>
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<p>That's a valid point. In the updated revision the peer PID is checked and must match the one of DrKonqi, before <tt style="background: #ebebeb; font-size: 13px;">prctl</tt> is called.</p>
<blockquote style="border-left: 3px solid #a7b5bf; color: #464c5c; font-style: italic; margin: 4px 0 12px 0; padding: 4px 12px; background-color: #f8f9fc;"><p>I also think *printf isn't save to call in a signal handler. Not sure about atoi.</p></blockquote>
<p><tt style="background: #ebebeb; font-size: 13px;">atoi</tt> seems to be safe, <tt style="background: #ebebeb; font-size: 13px;">(f)printf</tt> isn't indeed. Nevertheless it's used in the existing code already. Maybe that should be addressed in a different patch?</p>
<p>Thank you for your remarks!</p></div></div><br /><div><strong>REPOSITORY</strong><div><div>R285 KCrash</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D11236">https://phabricator.kde.org/D11236</a></div></div><br /><div><strong>To: </strong>croick, Frameworks<br /><strong>Cc: </strong>sitter, michaelh, ngraham<br /></div>