Bug 1842496 (CVE-2020-13659) - CVE-2020-13659 QEMU: exec: address_space_map returns NULL without setting length to zero may lead to DoS
Summary: CVE-2020-13659 QEMU: exec: address_space_map returns NULL without setting len...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-13659
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1842498 1842501 1842502 1842503 1842504 1842506 1842507 1910692
Blocks: 1772801
TreeView+ depends on / blocked
 
Reported: 2020-06-01 12:04 UTC by Prasad Pandit
Modified: 2022-04-17 20:56 UTC (History)
28 users (show)

Fixed In Version: QEMU 5.0.1
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference flaw was found in the MegaRAID SAS 8708EM2 emulator of the QEMU. This issue occurs because the address_space_map() API while mapping physical memory into the host's virtual address space, may return NULL without setting the length parameter to zero (0). This flaw allows a guest user or process to crash the QEMU process on the host resulting in a denial of service.
Clone Of:
Environment:
Last Closed: 2021-12-15 11:33:03 UTC


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Description Prasad Pandit 2020-06-01 12:04:34 UTC
A NULL pointer dereference issue was found in the MegaRAID SAS 8708EM2 emulatior of the QEMU. This issue occurs because the address_space_map() API while mapping physical memory into host's virtual address space may return NULL, without setting the length parameter to zero(0). A guest user/process may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg07313.html

Reference:
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  -> https://bugs.launchpad.net/qemu/+bug/1878259
  -> https://www.openwall.com/lists/oss-security/2020/06/01/3

Comment 1 Prasad Pandit 2020-06-01 12:04:47 UTC
Acknowledgments:

Name: Alexander Bulekov

Comment 2 Prasad Pandit 2020-06-01 12:06:11 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1842498]

Comment 7 Nick Tait 2021-03-02 20:18:05 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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