[panda-users] taint segmentation fault
xiaojuan Li
xiaotan6666 at gmail.com
Mon Apr 20 19:57:29 EDT 2015
i know you are busy.
I just get stuck in this taint step but have no idea no fix it...(use core
dump to find where it segfault )
here is the 512M version:
http://pan.baidu.com/s/1mgopzIg
the content of search string .txt is "passwordisqemu"
thanks!
2015-04-20 11:32 GMT-04:00 Brendan Dolan-Gavitt <brendandg at gatech.edu>:
> I will try to reproduce from those instructions in the next couple days.
> Sorry for the delay! Did you post the .rr of the recording with 512M
> somewhere? I only saw the 2G one.
>
> Thanks,
> Brendan
>
> On Mon, Apr 20, 2015 at 8:07 AM, xiaojuan Li <xiaotan6666 at gmail.com>
> wrote:
>
>> about the taint segfault, if you cannot download that .rr i upload
>> before, you can follow the step to reproduce:
>> 1)use android studio to create avd, choose api21 target android 5.0.1 use
>> the default size;you can get the cache-img,sdcard.img,data.img and
>> system.img and then copy kernel-qemu & rmdisk.img from sdk/systemimg;
>> 2)use pandaCovert.py to convert them and get the
>> (cache,data,system)-pandroid.qcow2 as well as kernel and initramfs;
>> 3)use runpandroid.py(-m 512) to boot emulator;telnet and begin_record
>> 4)run an app and input a string : end_record;
>> 5)use qemu-system-arm to replay(-m 512) with the panda
>> plugins:stringsearch,tstringsearch;tainted_instr.(the search string .txt is
>> the string you input)
>>
>> do you guys get the segfault ?
>> how can i fix it?
>> Thanks a lot!
>>
>> 2015-04-20 17:51 GMT+08:00 xiaojuan Li <xiaotan6666 at gmail.com>:
>>
>>> excuse me, i have noticed that the ida_taint plugin:"win7 only but othre
>>> os could be easily added".
>>> i have installed ida pro in my system(debian),modified the ida_taint.bat
>>> with my ida path,when i use it :./ida_taint.bat name.json qemu-system-arm
>>> it failed. it seems not available in linux, is it?
>>> Thanks a lot!
>>>
>>>
>>> 2015-04-10 21:24 GMT-04:00 Brendan Dolan-Gavitt <brendandg at gatech.edu>:
>>>
>>> Once you have used PANDA's taint system to identify the portions of the
>>>> code that process the data you're interested in, you will still have to
>>>> analyze that code do understand how it works. One way to do that might be
>>>> to use the scissors plugin to extract out the portion of the trace that
>>>> contains the code you're interested in, and then replay it with QEMU's "-d
>>>> in_asm -D asmlog.txt" options to get the disassembly for that code.
>>>>
>>>> Alternatively, you could take a memory snapshot at some point when the
>>>> code you want to analyze is in memory (using something like the pmemsave
>>>> plugin in PANDA), then use Volatility to analyze that memory image to
>>>> extract out the binary, which you could look at in IDA or something similar.
>>>>
>>>> Basically – disassemble the code that handles the data you're
>>>> interested in and find out how it works. Exactly what that means will
>>>> depend on what you're hoping to accomplish.
>>>>
>>>> -Brendan
>>>>
>>>> On Fri, Apr 10, 2015 at 9:07 PM, xiaojuan Li <xiaotan6666 at gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>> Thanks for your job first.
>>>>> I am a little confused about the result of the tainted.how can I get
>>>>> enough information about the processing code from the binary? use the gdb?
>>>>> Thanks!
>>>>>
>>>>> 2015-04-10 12:05 GMT+08:00 xiaojuan Li <xiaotan6666 at gmail.com>:
>>>>>
>>>>>> Thanks for your guys great work!
>>>>>> and I will try.
>>>>>>
>>>>>> 2015-04-10 11:42 GMT+08:00 Brendan Dolan-Gavitt <brendandg at gatech.edu
>>>>>> >:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> Tim has just updated the tainted_instructions tutorial so that it
>>>>>>> reflects how things work now. Could you look through that tutorial and see
>>>>>>> if it helps with your problem?
>>>>>>>
>>>>>>>
>>>>>>> https://github.com/moyix/panda/blob/master/docs/tainted_instructions.md
>>>>>>>
>>>>>>> Note that you will probably need to do a "git pull" and rebuild
>>>>>>> (make clean ; ./build.sh) in order to make sure everything works as it says
>>>>>>> in the tutorial.
>>>>>>>
>>>>>>> -Brendan
>>>>>>>
>>>>>>> On Thu, Apr 9, 2015 at 9:30 AM, xiaojuan Li <xiaotan6666 at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Now that the panda taint.md is not fresh,can you guys give me some
>>>>>>>> help?
>>>>>>>> I use the replay plugin,here is my command and the result.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> the content of pk_search_strings.txt is :"sdt"
>>>>>>>>
>>>>>>>> I am confused here:in the paper— Repeatable reverse with panda:
>>>>>>>> :
>>>>>>>> it is clear that:if I use the stringsearch and taint plugin,when it
>>>>>>>> matches, the taint label will be put and then taint action will start.but
>>>>>>>> when I use it, it seems wrong(the picture showed before):no taint action
>>>>>>>> execute,and i am confused about the tstringsearch's result.
>>>>>>>> how can i use it to analysis?
>>>>>>>> Thanks a lot!
>>>>>>>>
>>>>>>>>
>>>>>>>> 2015-04-08 10:14 GMT+08:00 xiaojuan Li <xiaotan6666 at gmail.com>:
>>>>>>>>
>>>>>>>>> I get the replay file by running runandroid script. and i use
>>>>>>>>> qemu-system-arm command just to do some replay work.
>>>>>>>>> I may not understand you at all in this emal.do you mean that i
>>>>>>>>> should gdb the original program rather than the record file?
>>>>>>>>> Thansk
>>>>>>>>>
>>>>>>>>> 2015-04-08 9:52 GMT+08:00 Brendan Dolan-Gavitt <
>>>>>>>>> brendandg at gatech.edu>:
>>>>>>>>>
>>>>>>>>>> Hmm. gdb should normally stop when you get a segfault.
>>>>>>>>>>
>>>>>>>>>> Are you by any chance running PANDA using the runandroid script?
>>>>>>>>>> If so, you will need to instead invoke PANDA manually, i.e.:
>>>>>>>>>>
>>>>>>>>>> gdb --args arm-softmmu/qemu-system-arm [...]
>>>>>>>>>>
>>>>>>>>>> And then once it crashes, type "bt" at the gdb prompt to get a
>>>>>>>>>> backtrace.
>>>>>>>>>>
>>>>>>>>>> -Brendan
>>>>>>>>>>
>>>>>>>>>> On Tue, Apr 7, 2015 at 9:47 PM, xiaojuan Li <
>>>>>>>>>> xiaotan6666 at gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> when gdb,it shows:
>>>>>>>>>>> and then i see the log:it shows segfault:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> 2015-04-08 9:03 GMT+08:00 xiaojuan Li <xiaotan6666 at gmail.com>:
>>>>>>>>>>>
>>>>>>>>>>>> maybe i am wrong.
>>>>>>>>>>>> i use the command
>>>>>>>>>>>> line:"taint2:label_mode=binary,query_outgoing_network=1"and I found that
>>>>>>>>>>>> when i use taint2, after it loads panda_taint2.so,it
>>>>>>>>>>>> shows:"taint2:instructed not to inline taint ops .success".
>>>>>>>>>>>>
>>>>>>>>>>>> 2015-04-08 8:54 GMT+08:00 xiaojuan Li <xiaotan6666 at gmail.com>:
>>>>>>>>>>>>
>>>>>>>>>>>>> ok.
>>>>>>>>>>>>> 1.I want to use taint plugin to get information about some
>>>>>>>>>>>>> functions(of course, it is closed-source),so I think I can stringsearch
>>>>>>>>>>>>> potential data and then taint them and next I can locate the functions
>>>>>>>>>>>>> which solves these data.
>>>>>>>>>>>>>
>>>>>>>>>>>>> 2.the command line I used is : stringsearch:name=***;
>>>>>>>>>>>>> taint2:tainted_instructions=1.
>>>>>>>>>>>>>
>>>>>>>>>>>>> thanks
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> 2015-04-08 8:40 GMT+08:00 Brendan Dolan-Gavitt <
>>>>>>>>>>>>> brendandg at gatech.edu>:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Could you provide:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> 1. What information you're trying to get
>>>>>>>>>>>>>> 2. The command line you're using to run PANDA with the taint2
>>>>>>>>>>>>>> plugin
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Right now I believe taint2 does not produce very much output
>>>>>>>>>>>>>> by default. Instead you use the -pandalog <filename> command line option,
>>>>>>>>>>>>>> and taint2 will write its results there in pandalog format; you can then
>>>>>>>>>>>>>> read them using pandalog_reader (see panda/pandalog_reader.c for details on
>>>>>>>>>>>>>> that tool).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -Brendan
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Tue, Apr 7, 2015 at 8:32 PM, xiaojuan Li <
>>>>>>>>>>>>>> xiaotan6666 at gmail.com> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> when I tried taint2,it showed the same error with taint1,
>>>>>>>>>>>>>>> the olny difference is that taint2 has no segfault error,just uninit taint
>>>>>>>>>>>>>>> plugin.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 2015-04-08 8:28 GMT+08:00 Brendan Dolan-Gavitt <
>>>>>>>>>>>>>>> brendandg at gatech.edu>:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Could you be a little more descriptive about how it failed?
>>>>>>>>>>>>>>>> Segfault? Error message? Incorrect output?
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -Brendan
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Tue, Apr 7, 2015 at 8:27 PM, xiaojuan Li <
>>>>>>>>>>>>>>>> xiaotan6666 at gmail.com> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i tried taint2 too,it failed.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> 2015-04-07 5:20 GMT+08:00 Leek, Timothy - 0559 - MITLL <
>>>>>>>>>>>>>>>>> tleek at ll.mit.edu>:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Also note that the “taint” plugin is somewhat defunct.
>>>>>>>>>>>>>>>>>> “taint2” is the one we are actively using and developing.
>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>> Tim Leek
>>>>>>>>>>>>>>>>>> Technical Staff
>>>>>>>>>>>>>>>>>> Cyber System Assessments
>>>>>>>>>>>>>>>>>> MIT Lincoln Laboratory
>>>>>>>>>>>>>>>>>> 781-981-2975
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> From: Brendan Dolan-Gavitt <brendandg at gatech.edu>
>>>>>>>>>>>>>>>>>> Date: Monday, April 6, 2015 at 5:18 PM
>>>>>>>>>>>>>>>>>> To: xiaojuan Li <xiaotan6666 at gmail.com>
>>>>>>>>>>>>>>>>>> Cc: "panda-users at mit.edu" <panda-users at mit.edu>
>>>>>>>>>>>>>>>>>> Subject: Re: [panda-users] taint segmentation fault
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Could you run that under gdb and provide us with a
>>>>>>>>>>>>>>>>>> backtrace when it crashes?
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -Brendan
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> On Sunday, April 5, 2015, xiaojuan Li <
>>>>>>>>>>>>>>>>>> xiaotan6666 at gmail.com> wrote:
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>>>>>> excuse me,i have a question about taint
>>>>>>>>>>>>>>>>>>> plugin:(stringsearch:name=***;taint:tainted_instructions=1)
>>>>>>>>>>>>>>>>>>> when I started it showed success:
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> but when it finished search,it showd "uninit taint
>>>>>>>>>>>>>>>>>>> plugin segementation fault"
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> how can I fix it?
>>>>>>>>>>>>>>>>>>> Thanks a lot!
>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>> wait and hope~~
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>> wait and hope~~
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>>>>>> panda-users mailing list
>>>>>>>>>>>>>>>>> panda-users at mit.edu
>>>>>>>>>>>>>>>>> http://mailman.mit.edu/mailman/listinfo/panda-users
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>> wait and hope~~
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> --
>>>>>>>>>>>>> wait and hope~~
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> wait and hope~~
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> wait and hope~~
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> wait and hope~~
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> wait and hope~~
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> wait and hope~~
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> wait and hope~~
>>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> wait and hope~~
>>>
>>
>>
>>
>> --
>> wait and hope~~
>>
>
>
--
wait and hope~~
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