Directory traversal vulnerability as described by
https://nvd.nist.gov/vuln/detail/CVE-2018-1000073.
(From OE-Core rev: 1a0a1785766c12003e3f8848852af84cae203e6b)
Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>