Bug 1842912 (CVE-2020-13765)

Summary:	CVE-2020-13765 QEMU: loader: OOB access while loading registered ROM may lead to code execution
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, berrange, cfergeau, dbecker, dwmw2, itamar, jen, jferlan, jjoyce, jmaloy, jschluet, knoel, lhh, lpeer, mburns, mkenneth, mrezanin, mst, pbonzini, ribarry, rjones, sclewis, slinaber, virt-maint, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	QEMU 4.2.0	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bound write access flaw was found in the way QEMU loads ROM contents at boot time. This flaw occurs in the rom_copy() routine while loading the contents of a 32-bit -kernel image into memory. Running an untrusted -kernel image may load contents at arbitrary memory locations, potentially leading to code execution with the privileges of the QEMU process.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-02 14:41:48 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:	1842922, 1842923, 1842924, 1842925
Bug Blocks:	1755361

Description Prasad Pandit 2020-06-02 11:37:35 UTC

An out-of-bound write access issue was found in the way QEMU loads ROM contents at boot time. It occurs in rom_copy() routine while loading contents of a 32-bit -kernel image into memory. Running an untrusted -kernel image may load contents at arbitrary memory locations, potentially leading to code execution with the privileges of the QEMU process.

Upstream patch:
---------------
  -> https://git.qemu.org/?p=qemu.git;a=commitdiff;h=e423455c4f23a1a828901c78fe6d03b7dde79319

Reference:
----------
  -> https://bugs.launchpad.net/qemu/+bug/1844635
  -> https://www.openwall.com/lists/oss-security/2020/06/03/6

Comment 8 errata-xmlrpc 2021-02-02 12:06:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:0347 https://access.redhat.com/errata/RHSA-2021:0347

Comment 9 Product Security DevOps Team 2021-02-02 14:41:48 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-2020-13765

Comment 10 Nick Tait 2021-03-02 20:17:29 UTC

Statement:

In Red Hat OpenStack Platform, because the flaw has a lower impact and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP qemu-kvm-rhev package.