Re: [Bug 537650] [NEW] slmodemd has an executable stack

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Ahmed,

I cannot run
1) :

^C[root@localhost ~]# execstack -c /usr/sbin/slmodemd -c USA /dev/slamr0
execstack: cannot open "USA": No such file or directory
execstack: "/dev/slamr0" is not an ELF file

C[root@localhost ~]# execstack -c /usr/sbin/slmodemd -c USA /dev/slamr0
execstack: cannot open "USA": No such file or directory
execstack: "/dev/slamr0" is not an ELF file

I have to use:

[root@localhost ~]# slmodemd -c USA /dev/slamr0
SmartLink Soft Modem: version 2.9.11 Mar 12 2010 18:28:10
symbolic link `/dev/ttySL0' -> `/dev/pts/2' created.
modem `slamr0' created. TTY is `/dev/pts/2'
Use `/dev/ttySL0' as modem device, Ctrl+C for termination.

device 10b9:5459 is grabbed by driver serial: try to release
serial 0000:05:02.0: PCI INT A disabled
slamr: module license 'Smart Link Ltd.' taints kernel.
Disabling lock debugging due to kernel taint
slamr: SmartLink AMRMO modem.
slamr: probe 10b9:5459 SL1800 card...
slamr 0000:05:02.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
slamr: mc97 codec is SIL26
slamr: slamr0 is SL1800 card.
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
[olivares@localhost ~]$ uname -r
2.6.32.9-70.fc12.i686.PAE

Is there anything else I can do?  I am not sure that I did it right
and sorry for not getting back.  I have been kind of busy :(

Regards,

Antonio

On 3/12/10, أحمد المحمودي <aelmahmoudy@xxxxxxxxxx> wrote:
> Hello,
>
>   I got the following security vulnerability report from an Ubuntu
> developer,
>
> On Thu, Mar 11, 2010 at 09:02:43PM -0000, Kees Cook wrote:
>> *** This bug is a security vulnerability ***
>>
>> Public security bug reported:
>>
>> execstack -q /usr/sbin/slmodemd
>>  X /usr/sbin/slmodemd
>>
>> This is potentially dangerous, and should be addressed.  Please see:
>> https://wiki.ubuntu.com/SecurityTeam/Roadmap/ExecutableStacks
>> for details.
> ---end quoted text---
>
>   He mentioned in a following email that issue is caused by dsplibs.o,
>   anyways, according to the wiki page mentioned above, this can be
>   solved by running the following after building slmodemd:
>
>   execstack -c slmodemd
>
>   I can do this in the Debian/Ubuntu package, but I need to make sure
>   that it won't break the usability of sl-modem, can Antonio or others
>   test the following:
>
>   1) Run: execstack -c /usr/sbin/slmodemd (I assume that slmodemd is
>   installed in /usr/sbin on your systems)
>
>   2) Try using the modem (internet, faxing,...) with the modified
>   slmodemd, please try two cases:
>     a) with ALSA driver
>     b) with slamr driver
>
>   I might be able to get my hands on a machine that has a smartlink
>   modem (but using ALSA driver) today, in that case I'll try testing
>   case (a).
>
> --
>  ‎أحمد المحمودي (Ahmed El-Mahmoudy)
>   Digital design engineer
>  GPG KeyID: 0xEDDDA1B7
>  GPG Fingerprint: 8206 A196 2084 7E6D 0DF8  B176 BC19 6A94 EDDD A1B7
>


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