CVE-2018-16867 QEMU: dev-mtp: path traversal in usb_mtp_write_data of the Media Transfer Protocol (MTP)

[P J P <ppandit () redhat com>]

  Hello,

A flaw was found in qemu Media Transfer Protocol (MTP). A path traversal in 
the in usb_mtp_write_data function in hw/usb/dev-mtp.c due to an improper 
filename sanitization. When the guest device is mounted in read-write mode, 
this allows to read/write arbitrary files which may lead do DoS scenario OR 
possibly lead to code execution on the host.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg00390.html

This issue was reported by Michael Hanselmann of hansmi.ch.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
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