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Date: Thu, 23 Feb 2017 09:59:13 +0530 (IST)
From: P J P <>
To: oss security list <>
Subject: CVE-2017-2633 Qemu: VNC: memory corruption due to unchecked resolution


Quick Emulator(Qemu) built with the VNC display driver support is vulnerable 
to an out-of-bounds memory access issue. It could occur while refreshing the 
vnc display surface area in 'vnc_refresh_server_surface'.

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

Upstream patch:

Older versions of Qemu are affected, latest upstream releases are not.

'CVE-2017-2633' has been assigned to this issue by Red Hat Inc.

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

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