CVE-2017-6414 Qemu: libcacard: host memory leakage while creating new APDU

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

  Hello,

The CAC(Common Access Card) library, used by Quick Emulator(Qemu) to implement 
smartcard support, is vulnerable to a host memory leakage issue. It could 
occur while allocating a new APDU object using guest supplied raw byte stream 
in 'vcard_apdu_new'.

A guest user/process could use this flaw to leak host memory resulting in DoS.

Upstream patch:
---------------
  -> https://cgit.freedesktop.org/spice/libcacard/commit/?id=9113dc6a303604a2d9812ac70c17d076ef11886c

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1427833

This issue was reported by Li Qiang of 360.cn Inc.

'CVE-2017-6414' assigned via -> http://cveform.mitre.org/

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