Re: Error with pcsc_scan - "buffer overflow detected"

Hello,

2016-07-27 22:54 GMT+02:00 Chris Green <[email protected]>:

> I'm trying to use openct and pcscd to read from a SIM card using a
> Phoenix based USB card reader.
>
> I'm running these on an xubuntu 14.04 system.  I'm using pcscd
> pcsc-tools and libpcsclite-dev from the Ubuntu repositories but I've
> been building my own openct as per your instructions:-
>
> https://github.com/OpenSC/openct/wiki/A-quick-installation-guide-to-openct
>
>
> I seem to have openct and openct-tool working OK:-
>
>     root@acer-aspire:~# openct-tool atr
>     Detected Phoenix reader
>     Card present, status changed
>     ATR: 3f 2f 00 80 69 af 03 07 03 5a 00 15 0a 0e 83 3e 9f 16 ff ff ff ff
> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>

This ATR is far too long.


> However, should I be getting that string of 'ff ff ff ff ....' at the
> end?
>

No. It is a bug.


>
>
> Then if I run pcsc_scan I get:-
>
>     root@acer-aspire:/etc/reader.conf.d# pcsc_scan
>     PC/SC device scanner
>     V 1.4.22 (c) 2001-2011, Ludovic Rousseau <[email protected]>
>     Compiled with PC/SC lite version: 1.8.10
>     Using reader plug'n play mechanism
>     Scanning present readers...
>     0: openct 00 00
>     1: ��������������������
>
>     Wed Jul 27 21:37:22 2016
>     Reader 0: openct 00 00
>       Card state: Card inserted,
>       ATR: 3F 2F 00 80 69 AF 03 07 03 5A 00 15 0A 0E 83 3E 9F 16 FF FF FF
> FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 40 00 00 00 00 00 00 00 FF FF
> FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
>
>     *** buffer overflow detected ***: pcsc_scan terminated
>     ======= Backtrace: =========
>     /lib/i386-linux-gnu/libc.so.6(+0x68fce)[0xb75a9fce]
>     /lib/i386-linux-gnu/libc.so.6(__fortify_fail+0x6b)[0xb763cb8b]
>     /lib/i386-linux-gnu/libc.so.6(+0xfaa1a)[0xb763ba1a]
>     /lib/i386-linux-gnu/libc.so.6(+0xfa178)[0xb763b178]
>     /lib/i386-linux-gnu/libc.so.6(_IO_default_xsputn+0x8e)[0xb75b1d8e]
>     /lib/i386-linux-gnu/libc.so.6(_IO_vfprintf+0x4a79)[0xb7589289]
>     /lib/i386-linux-gnu/libc.so.6(__vsprintf_chk+0xb1)[0xb763b231]
>     /lib/i386-linux-gnu/libc.so.6(__sprintf_chk+0x2f)[0xb763b15f]
>     pcsc_scan[0x8048fc6]
>     /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb755aaf3]
>     pcsc_scan[0x80493ca]
>     ======= Memory map: ========
>     08048000-0804a000 r-xp 00000000 08:06 5642158    /usr/bin/pcsc_scan
>     0804a000-0804b000 r--p 00001000 08:06 5642158    /usr/bin/pcsc_scan
>     0804b000-0804c000 rw-p 00002000 08:06 5642158    /usr/bin/pcsc_scan
>     08393000-083b4000 rw-p 00000000 00:00 0          [heap]
>     b74f3000-b750f000 r-xp 00000000 08:06 5375119
> /lib/i386-linux-gnu/libgcc_s.so.1
>     b750f000-b7510000 rw-p 0001b000 08:06 5375119
> /lib/i386-linux-gnu/libgcc_s.so.1
>     b7523000-b7524000 rw-p 00000000 00:00 0
>     b7524000-b753c000 r-xp 00000000 08:06 5374047 /lib/i386-linux-gnu/
> libpthread-2.19.so
>     b753c000-b753d000 r--p 00018000 08:06 5374047 /lib/i386-linux-gnu/
> libpthread-2.19.so
>     b753d000-b753e000 rw-p 00019000 08:06 5374047 /lib/i386-linux-gnu/
> libpthread-2.19.so
>     b753e000-b7541000 rw-p 00000000 00:00 0
>     b7541000-b76e9000 r-xp 00000000 08:06 5374055 /lib/i386-linux-gnu/
> libc-2.19.so
>     b76e9000-b76ea000 ---p 001a8000 08:06 5374055 /lib/i386-linux-gnu/
> libc-2.19.so
>     b76ea000-b76ec000 r--p 001a8000 08:06 5374055 /lib/i386-linux-gnu/
> libc-2.19.so
>     b76ec000-b76ed000 rw-p 001aa000 08:06 5374055 /lib/i386-linux-gnu/
> libc-2.19.so
>     b76ed000-b76f0000 rw-p 00000000 00:00 0
>     b76f0000-b76fa000 r-xp 00000000 08:06 5375197
> /lib/i386-linux-gnu/libpcsclite.so.1.0.0
>     b76fa000-b76fb000 r--p 00009000 08:06 5375197
> /lib/i386-linux-gnu/libpcsclite.so.1.0.0
>     b76fb000-b76fc000 rw-p 0000a000 08:06 5375197
> /lib/i386-linux-gnu/libpcsclite.so.1.0.0
>     b770d000-b7711000 rw-p 00000000 00:00 0
>     b7711000-b7713000 r--p 00000000 00:00 0          [vvar]
>     b7713000-b7715000 r-xp 00000000 00:00 0          [vdso]
>     b7715000-b7735000 r-xp 00000000 08:06 5374048 /lib/i386-linux-gnu/
> ld-2.19.so
>     b7735000-b7736000 r--p 0001f000 08:06 5374048 /lib/i386-linux-gnu/
> ld-2.19.so
>     b7736000-b7737000 rw-p 00020000 08:06 5374048 /lib/i386-linux-gnu/
> ld-2.19.so
>     bf840000-bf861000 rw-p 00000000 00:00 0          [stack]
>     Aborted (core dumped)
>     root@acer-aspire:/etc/reader.conf.d#
>
>
> It's *almost* working!
>
> Can anyone suggest what might be wrong and what I can do about it?
>

I suspect a bug in OpenCT.

I suggest to use a CCID supported reader instead.

Bye

[1] https://pcsclite.alioth.debian.org/ccid/supported.html

-- 
 Dr. Ludovic Rousseau

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