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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I want to report another Use-after-free bug in live555:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The bug happens when setting up the same stream twice:<o:p></o:p></p>
<p class="MsoNormal">After sending a “DESCRIBE” command, we send a “SETUP” command, then use the returned “Session ID” to send another “SETUP” command to trigger this UAF:<o:p></o:p></p>
<p class="MsoNormal"><img width="1305" height="446" style="width:13.5937in;height:4.6458in" id="Picture_x0020_1" src="cid:image001.png@01D78B15.663BFB20"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To reproduce it, please download the attachment:<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Build the docker image:
<o:p></o:p></li></ol>
<p class="MsoListParagraph" style="text-indent:.5in">docker build . -t live555_bug<o:p></o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Start a container on the image and open two terminals.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">In one terminal, run the live555:
<o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:.5in;text-indent:.5in">cd live/testProgs/; ./testOnDemandRTSPServer<o:p></o:p></p>
<ol style="margin-top:0in" start="4" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">On the other terminal, run the poc:
<o:p></o:p></li></ol>
<p class="MsoListParagraph" style="margin-left:1.0in">python3 poc.py<o:p></o:p></p>
<p class="MsoNormal"> Then the testOnDemandRTSPServer crashes.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal">Jinsheng Ba<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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