oss-security - CVE-2017-10664 Qemu: qemu-nbd: server breaks with SIGPIPE upon client abort

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Message-ID: <alpine.LFD.2.20.1706291419220.1726@wniryva>
Date: Thu, 29 Jun 2017 14:21:14 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE-2017-10664 Qemu: qemu-nbd: server breaks with SIGPIPE upon client
 abort

   Hello,

Quick Emulator(Qemu) built with the Network Block Device(NBD) Server support 
is vulnerable to a crash via SIGPIPE signal. It could occur if a client aborts 
connection due to any failure during negotiation.

A remote user/process could use this flaw to crash the qemu-nbd server 
resulting in DoS.

Upstream patch:
---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg02693.html

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1466190

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

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