oss-security - CVE request Qemu: malicious PRDT flow from guest to host

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Message-ID: <alpine.LFD.2.11.1503241045380.5202@wniryva>
Date: Tue, 24 Mar 2015 10:52:34 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE request Qemu: malicious PRDT flow from guest to host

   Hello,

Due to inconsistent error checking, Qemu emulator allows malicious PRDT data 
to flow from a guest to the host's IDE or AHCI controllers. This could result 
in infinite loop or memory leakage on the host leading to unbounded resource 
consumption.

A privileged user inside guest could use this flaw to crash the system,
resulting in DoS.

Upstream fix:
-------------
   -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=3251bdcf1c67427d964517053c3d185b46e618e8

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

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