oss-security - CVE request Qemu: rng-random: arbitrary stack based allocation leading to corruption

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Message-ID: <alpine.LFD.2.20.1603041532360.19054@wniryva>
Date: Fri, 4 Mar 2016 15:34:36 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE request Qemu: rng-random: arbitrary stack based allocation
 leading to corruption

   Hello,

Qemu emulator built with the Pseudo Random Number Generator(PRNG) back-end 
support is vulnerable to an arbitrary stack based allocation and memory 
corruption via random bytes issue. It could occur when a guest requests for 
entropy for random number generation.

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

Upstream patch:
---------------
   -> http://git.qemu.org/?p=qemu.git;a=commit;h=60253ed1e6ec6d8e5ef2efe7bf755f475dce9956

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1314676

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

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