oss-security - CVE-2017-15268. Qemu: I/O: potential memory exhaustion via websock connection to VNC

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Message-ID: <nycvar.YSQ.7.76.1710121158110.25482@wniryva>
Date: Thu, 12 Oct 2017 12:00:30 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE-2017-15268. Qemu: I/O: potential memory exhaustion via websock
 connection to VNC

   Hello,

Quick Emulator(Qemu) built with the I/O channels websockets support is 
vulnerable to a memory leakage issue. It could occur while sending screen 
updates to a client, which is slow to read and process them further.

A privileged guest user could use this flaw to cause a DoS on the host and/or 
potentially crash the Qemu process instance on the host.

Upstream patch:
---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2017-10/msg02278.html

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1496879

CVE assigned via https://cveform.mitre.org/

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

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