ppp: Security Advisory - CVE-2015-3310

ppp: Security Advisory - CVE-2015-3310

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3310

Buffer overflow in the rc_mksid function in plugins/radius/util.c in
Paul's PPP Package (ppp) 2.4.6 and earlier, when the PID for pppd is
greater than 65535, allows remote attackers to cause a denial of
service (crash) via a start accounting message to the RADIUS server.

oe-core is using ppp 2.4.7, and this CVE say ppp 2.4.7 was not
effected, but I found this buggy codes are same between 2.4.6 and
2.4.7, and 2.4.7 should have this issue.

Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>