oss-security - CVE-2015-5225 Qemu: ui: vnc: heap memory corruption issue

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Date: Sat, 22 Aug 2015 01:45:07 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE-2015-5225 Qemu: ui: vnc: heap memory corruption issue

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

    Hello,

Qemu emulator built with the VNC display driver support is vulnerable to a 
buffer overflow flaw leading to a heap memory corruption issue. It could occur 
while refreshing the server display surface via routine 
vnc_refresh_server_surface().

A privileged guest user could use this flaw to corrupt the heap memory and 
crash the Qemu process instance OR potentially use it to execute arbitrary 
code on the host.

Upstream fix:
- -------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2015-08/msg02495.html

Issue introduced by:
- --------------------
   -> http://git.qemu.org/?p=qemu.git;a=commit;h=bea60dd7679364493a0d7f5b


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

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