Bug 1842912 (CVE-2020-13765) - CVE-2020-13765 QEMU: loader: OOB access while loading registered ROM may lead to code execution
Summary: CVE-2020-13765 QEMU: loader: OOB access while loading registered ROM may lead...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-13765
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1842922 1842923 1842924 1842925
Blocks: 1755361
TreeView+ depends on / blocked
 
Reported: 2020-06-02 11:37 UTC by Prasad Pandit
Modified: 2021-03-02 20:17 UTC (History)
25 users (show)

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.
Clone Of:
Environment:
Last Closed: 2021-02-02 14:41:48 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:0347 0 None None None 2021-02-02 12:06:49 UTC

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.
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