Re: CVE request: kernel: Heap corruption in ROSE

[Eugene Teo <eugene () redhat com>]

On 09/21/2010 12:25 PM, Dan Rosenberg wrote:
> When binding a ROSE socket, the "srose_ndigis" field of the
> user-provided sockaddr_rose struct is intended to be restricted to
> less than ROSE_MAX_DIGIS.  However, since this field is a signed
> integer, this check will pass when provided with a negative value,
> allowing the "source_ndigis" field of the rose_sock struct (which is
> an unsigned char) to be set to arbitrary values.  Then, by calling a
> function such as rose_getname(), heap corruption results, since this
> field is used as a maximum index to read from and write into an array
> of ROSE_MAX_DIGIS size.  This can only be triggered by unprivileged
> users when a ROSE device (e.g. rose0) exists.
>
> Reference (and fix):
> http://marc.info/?l=linux-netdev&m=128502238927086&w=2

Please use CVE-2010-3310.

Thanks, Eugene
--
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }