oss-security - CVE-2017-5994 Virglrenderer: out-of-bounds access in vrend_create_vertex_elements

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Date: Wed, 15 Feb 2017 23:36:13 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Li Qiang <liqiang6-s@....cn>
Subject: CVE-2017-5994 Virglrenderer: out-of-bounds access in
 vrend_create_vertex_elements_state

   Hello,

Virgil 3d project, used by Quick Emulator(Qemu) to implement 3D GPU support 
for the virtio GPU, is vulnerable to an OOB array access issue. It could occur 
when creating vertex elements array in vrend_create_vertex_elements_state().

A guest user/process could use this flaw to crash the Qemu process instance 
resulting DoS.

Upstream patch:
---------------
   -> https://cgit.freedesktop.org/virglrenderer/commit/?id=114688c526fe45f341d75ccd1d85473c3b08f7a7

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1422452

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

'CVE-2017-5994' assigned via -> https://cveform.mitre.org/

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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