<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Use After Free Vulnerability lldb_private::Debugger"
href="https://llvm.org/bugs/show_bug.cgi?id=25742">25742</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Use After Free Vulnerability lldb_private::Debugger
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>3.4
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ichaithu@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15398" name="attach_15398" title="Proof-of-Concept for the crash">attachment 15398</a> <a href="attachment.cgi?id=15398&action=edit" title="Proof-of-Concept for the crash">[details]</a></span>
Proof-of-Concept for the crash
A use after free vulnerability exists in com.apple.LLDB.framework on Apple Mac
OS X 10.11.1 in LLDB version 340.4.110.1, that on exploitation, would allow an
attacker to execute arbitrary code with the privileges of the user.
Steps to reproduce:
~/D/A/t/lldbPython ❯❯❯ lldb
(lldb)script
Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.
<span class="quote">>>> import lldb
>>> s=lldb.SBDebugger.Create()
>>> s.__swig_destroy__(s)
>>> print s</span >
Backtrace of the crash:
0 com.apple.LLDB.framework 0x0000000105c0ae0a
lldb::SBDebugger::GetDescription(lldb::SBStream&) + 28
1 com.apple.LLDB.framework 0x0000000105c5be4c
_wrap_SBDebugger___str__(_object*, _object*) + 128
2 org.python.python 0x0000000108ea0a0b PyEval_EvalFrameEx +
13400
3 org.python.python 0x0000000108e9d3c1 PyEval_EvalCodeEx +
1583
4 org.python.python 0x0000000108e422e5 0x108e1a000 + 164581
5 org.python.python 0x0000000108e24202 PyObject_Call + 99
6 org.python.python 0x0000000108e2eff5 0x108e1a000 + 86005
7 org.python.python 0x0000000108e24202 PyObject_Call + 99
8 org.python.python 0x0000000108ea2e83
PyEval_CallObjectWithKeywords + 165
9 org.python.python 0x0000000108e6aa8f 0x108e1a000 + 330383
10 org.python.python 0x0000000108e53e17 _PyObject_Str + 127
11 org.python.python 0x0000000108e53eb0 PyObject_Str + 12
12 org.python.python 0x0000000108e53b70 0x108e1a000 + 236400
13 org.python.python 0x0000000108e3afb3 PyFile_WriteObject +
338
14 org.python.python 0x0000000108e9fb01 PyEval_EvalFrameEx +
9550
15 org.python.python 0x0000000108e9d3c1 PyEval_EvalCodeEx +
1583
16 org.python.python 0x0000000108ea143e PyEval_EvalFrameEx +
16011
17 org.python.python 0x0000000108e9d3c1 PyEval_EvalCodeEx +
1583
18 org.python.python 0x0000000108ea34ae 0x108e1a000 + 562350
19 org.python.python 0x0000000108ea030c PyEval_EvalFrameEx +
11609
20 org.python.python 0x0000000108e9d3c1 PyEval_EvalCodeEx +
1583
21 org.python.python 0x0000000108ea34ae 0x108e1a000 + 562350
22 org.python.python 0x0000000108ea030c PyEval_EvalFrameEx +
11609
23 org.python.python 0x0000000108ea3541 0x108e1a000 + 562497
24 org.python.python 0x0000000108ea030c PyEval_EvalFrameEx +
11609
25 org.python.python 0x0000000108e9d3c1 PyEval_EvalCodeEx +
1583
26 org.python.python 0x0000000108ea34ae 0x108e1a000 + 562350
27 org.python.python 0x0000000108ea030c PyEval_EvalFrameEx +
11609
28 org.python.python 0x0000000108e9d3c1 PyEval_EvalCodeEx +
1583
29 org.python.python 0x0000000108ea34ae 0x108e1a000 + 562350
30 org.python.python 0x0000000108ea030c PyEval_EvalFrameEx +
11609
31 org.python.python 0x0000000108ea3541 0x108e1a000 + 562497
32 org.python.python 0x0000000108ea030c PyEval_EvalFrameEx +
11609
33 org.python.python 0x0000000108e9d3c1 PyEval_EvalCodeEx +
1583
34 org.python.python 0x0000000108e9cd8c PyEval_EvalCode + 54
35 org.python.python 0x0000000108ebca42 0x108e1a000 + 666178
36 org.python.python 0x0000000108ebcbff PyRun_StringFlags +
109
37 org.python.python 0x0000000108ebcb53
PyRun_SimpleStringFlags + 69
38 com.apple.LLDB.framework 0x00000001079e1cef
IOHandlerPythonInterpreter::Run() + 245
39 com.apple.LLDB.framework 0x00000001078e7b43
lldb_private::Debugger::ExecuteIOHandlers() + 63
40 com.apple.LLDB.framework 0x00000001079c89cc
lldb_private::CommandInterpreter::RunCommandInterpreter(bool, bool,
lldb_private::CommandInterpreterRunOptions&) + 126
41 com.apple.LLDB.framework 0x0000000105c0ca80
lldb::SBDebugger::RunCommandInterpreter(bool, bool) + 68
42 lldb 0x0000000105bdc05f Driver::MainLoop() +
2347
43 lldb 0x0000000105bdc594 main + 268
44 libdyld.dylib 0x00007fff9654e5ad start + 1
Please find the Proof-of-Concept attached as a python file.
Usage:
~/D/A/t/lldbPython ❯❯❯ python poc.py</pre>
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