Bug 1636777 (CVE-2018-17963)

Summary:	CVE-2018-17963 QEMU: net: ignore packets with large size
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:	amit, apevec, areis, berrange, cfergeau, chrisw, dwmw2, itamar, jen, jforbes, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, rbalakri, rbryant, rjones, robinlee.sysu, sclewis, slinaber, tdecacqu, 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 potential integer overflow issue was found in the networking back-end of QEMU. It could occur while receiving packets, because it accepted packets with large size value. Such overflow could lead to OOB buffer access issue. A user inside guest could use this flaw to crash the QEMU process resulting in DoS.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-06 13:19:58 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1636778, 1636779, 1636780, 1636781, 1636782, 1636783, 1636784, 1636785, 1636786, 1636787, 1636788, 1636789, 1636790
Bug Blocks:	1581014

Description Prasad Pandit 2018-10-07 15:51:22 UTC

A potential integer overflow issue was found in the QEMU emulator. It could occur when a packet with large packet size is accepted and processed.
A user inside guest could use this flaw to crash the Qemu process resulting in DoS.

Upstream fix:
-------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03267.html
  -> https://git.qemu.org/?p=qemu.git;a=commit;h=25c01bd19d0e4b66f357618aeefda1ef7a41e21a

Reference:
----------
  -> https://www.openwall.com/lists/oss-security/2018/10/08/1

Comment 1 Prasad Pandit 2018-10-07 15:51:25 UTC

Acknowledgments:

Name: Daniel Shapira (Twistlock)

Comment 2 Prasad Pandit 2018-10-07 15:59:21 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1636782]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1636783]

Comment 4 errata-xmlrpc 2019-08-06 12:23:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2166 https://access.redhat.com/errata/RHSA-2019:2166

Comment 5 Product Security DevOps Team 2019-08-06 13:19:58 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2018-17963

Comment 6 errata-xmlrpc 2019-08-09 00:48:26 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 10.0 (Newton)
  Red Hat OpenStack Platform 13.0 (Queens)
  Red Hat OpenStack Platform 14.0 (Rocky)

Via RHSA-2019:2425 https://access.redhat.com/errata/RHSA-2019:2425

Comment 7 errata-xmlrpc 2019-08-22 09:18:27 UTC

This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
  Red Hat Virtualization Engine 4.3

Via RHSA-2019:2553 https://access.redhat.com/errata/RHSA-2019:2553