Re: CVE Request -- oprofile -- Local privilege escalation via crafted opcontrol event parameter when authorized by sudo

[William Cohen <wcohen () redhat com>]

On 04/29/2011 02:16 PM, Jan Lieskovsky wrote:
> Hello Josh, Steve, vendors,
>
>   It was found that oprofile profiling system did not properly sanitize
> the content of event argument, provided to oprofile profiling control
> utility (opcontrol). If a local unprivileged user was authorized by
> sudoers file to run the opcontrol utility, they could use the flaw
> to escalate their privileges (execute arbitrary code with the privileges
> of the privileged system user, root). Different vulnerability than
> CVE-2006-0576.
>
> References:
> [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=624212
> [2] https://bugzilla.redhat.com/show_bug.cgi?id=700883
>
> Could you allocate a CVE id for this?
>
> Thank you & Regards, Jan.
> -- 
> Jan iankko Lieskovsky / Red Hat Security Response Team
>
> P.S.: Oprofile is not encouraged to be run under sudo, but still
>       should not allow escalation of privileges.

I don't know if this is the best way to fix this issue, but attached is a patch that filters out all but alpha numeric 
characters and '_'. Feedback on the patch would be appreciated.

-Will

Attachment: oprof-sanitize.patch
Description: