Bug 1204919 (CVE-2014-9718)

Summary:	CVE-2014-9718 Qemu: PRDT overflow from guest to host
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abaron, amit.shah, apevec, areis, berrange, carnil, cfergeau, chrisw, dallan, dwmw2, ehabkost, gkotton, itamar, knoel, lhh, lpeer, markmc, mkenneth, mrezanin, mtosatti, pbonzini, rbryant, rjones, sclewis, scottt.tw, srevivo, virt-maint, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A denial of service flaw was found in the way QEMU handled malformed Physical Region Descriptor Table (PRDT) data sent to the host's IDE and/or AHCI controller emulation. A privileged guest user could use this flaw to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 00:44:17 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1205100, 1205103, 1205322, 1216968
Bug Blocks:	1169000

Description Prasad Pandit 2015-03-23 18:36:31 UTC

Upstream Qemu is vulnerable to sending malicious PRDT data to the host's
IDE and/or AHCI controller emulation. This could result in infinite loop or memory leakage on the host leading to unbounded resource consumption on the host.

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

Comment 1 Prasad Pandit 2015-03-24 08:49:45 UTC

Statement:

This issue did not affect the versions of the kvm package as shipped with Red Hat Enterprise Linux 5 and the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6.

This issue affects the version of the qemu-kvm package as shipped with Red Hat Enterprise Linux 7, a future update may address this flaw.

Comment 3 Prasad Pandit 2015-03-24 08:54:38 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1205103]

Comment 4 Vasyl Kaigorodov 2015-03-24 17:08:11 UTC

*** Bug 1205321 has been marked as a duplicate of this bug. ***