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AUSCERT External Security Bulletin Redistribution
ESB-2021.1210
qemu security update
12 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: qemu
Publisher: Debian
Operating System: Debian GNU/Linux
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20257 CVE-2021-20255 CVE-2021-20203
CVE-2021-3416 CVE-2021-3409 CVE-2021-3392
CVE-2020-25085 CVE-2020-17380
Reference: ESB-2021.1181
ESB-2021.0652
ESB-2020.4246
ESB-2020.4245
Original Bulletin:
https://www.debian.org/lts/security/2021/dla-2623
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Debian LTS Advisory DLA-2623-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Markus Koschany
April 10, 2021 https://wiki.debian.org/LTS
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Package : qemu
Version : 1:2.8+dfsg-6+deb9u14
CVE ID : CVE-2020-17380 CVE-2021-3392 CVE-2021-3409 CVE-2021-3416
CVE-2021-20203 CVE-2021-20255 CVE-2021-20257
Debian Bug : 984450 984451 984452 984448 984449 970937
Several security vulnerabilities have been discovered in QEMU, a fast processor
emulator.
CVE-2021-20257
net: e1000: infinite loop while processing transmit descriptors
CVE-2021-20255
A stack overflow via an infinite recursion vulnerability was found in the
eepro100 i8255x device emulator of QEMU. This issue occurs while processing
controller commands due to a DMA reentry issue. This flaw allows a guest
user or process to consume CPU cycles or crash the QEMU process on the
host, resulting in a denial of service.
CVE-2021-20203
An integer overflow issue was found in the vmxnet3 NIC emulator of the
QEMU. It may occur if a guest was to supply invalid values for rx/tx queue
size or other NIC parameters. A privileged guest user may use this flaw to
crash the QEMU process on the host resulting in DoS scenario.
CVE-2021-3416
A potential stack overflow via infinite loop issue was found in various NIC
emulators of QEMU in versions up to and including 5.2.0. 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.
CVE-2021-3416
The patch for CVE-2020-17380/CVE-2020-25085 was found to be ineffective,
thus making QEMU vulnerable to the out-of-bounds read/write access issues
previously found in the SDHCI controller emulation code. This flaw allows a
malicious privileged guest to crash the QEMU process on the host, resulting
in a denial of service or potential code execution.
For Debian 9 stretch, these problems have been fixed in version
1:2.8+dfsg-6+deb9u14.
We recommend that you upgrade your qemu packages.
For the detailed security status of qemu please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/qemu
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
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The post ESB-2021.1210 – [Debian] qemu: Multiple vulnerabilities appeared first on Malware Devil.
https://malwaredevil.com/2021/04/12/esb-2021-1210-debian-qemu-multiple-vulnerabilities/?utm_source=rss&utm_medium=rss&utm_campaign=esb-2021-1210-debian-qemu-multiple-vulnerabilities
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