Bug 1932827 (CVE-2021-3416) - CVE-2021-3416 QEMU: net: Infinite loop in loopback mode may lead to stack overflow
Summary: CVE-2021-3416 QEMU: net: Infinite loop in loopback mode may lead to stack ove...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-3416
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:
: 1933827 (view as bug list)
Depends On: 1932828 1932829 1932911 1932914 1932917 1932919 1985088 1985460
Blocks: 1887771 1932873 1933831 1933837
TreeView+ depends on / blocked
 
Reported: 2021-02-25 11:44 UTC by Prasad J Pandit
Modified: 2021-09-30 16:54 UTC (History)
28 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.
Clone Of:
Environment:
Last Closed: 2021-08-10 19:28:14 UTC


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:3061 0 None None None 2021-08-10 13:50:28 UTC
Red Hat Product Errata RHSA-2021:3703 0 None None None 2021-09-30 16:54:04 UTC

Description Prasad J Pandit 2021-02-25 11:44:06 UTC
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU. The said issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume cpu cycles or crash the QEMU process on the host resulting in DoS scenario.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07431.html

Comment 2 Prasad J Pandit 2021-02-25 11:44:55 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1932828]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1932829]

Comment 8 Prasad J Pandit 2021-02-26 14:47:31 UTC
External References:

https://www.openwall.com/lists/oss-security/2021/02/26/1

Comment 9 Mauro Matteo Cascella 2021-03-04 16:55:25 UTC
*** Bug 1933827 has been marked as a duplicate of this bug. ***

Comment 10 Mauro Matteo Cascella 2021-03-18 16:05:21 UTC
Revised patch v4 series:
https://lists.gnu.org/archive/html/qemu-devel/2021-03/msg01550.html

Comment 13 errata-xmlrpc 2021-08-10 13:50:25 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:3061 https://access.redhat.com/errata/RHSA-2021:3061

Comment 14 Product Security DevOps Team 2021-08-10 19:28:14 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-2021-3416

Comment 15 errata-xmlrpc 2021-09-30 16:54:02 UTC
This issue has been addressed in the following products:

  Advanced Virtualization for RHEL 8.4.0.Z

Via RHSA-2021:3703 https://access.redhat.com/errata/RHSA-2021:3703


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