oss-security - CVE-2019-12155 QEMU: qxl: null pointer dereference while releasing spice resources

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Message-ID: <nycvar.YSQ.7.76.1905221234330.22124@xnncv>
Date: Wed, 22 May 2019 12:38:24 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Bugs SysSec <bugs-syssec@....de>
Subject: CVE-2019-12155 QEMU: qxl: null pointer dereference while releasing
 spice resources

   Hello,

A null pointer dereference issue was found the QXL VGA card emulator of QEMU. 
It could occur while releasing resources allocated for a SPICE server thread 
in interface_release_resources().

A guest user could use this flaw to crash the QEMU process resulting in DoS 
scenario.

Upstream patch:
---------------
   -> https://git.qemu.org/?p=qemu.git;a=commit;h=d52680fc932efb8a2f334cc6993e705ed1e31e99

This issue was reported by Sergej Schumilo, Cornelius Aschermann and Simon 
Wrner of Ruhr University Bochum.

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

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