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AUSCERT External Security Bulletin Redistribution
ESB-2021.1210
qemu security update
12 April 2021
===========================================================================
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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This security bulletin is provided as a service to AusCERT's members. As
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NOTE: This is only the original release of the security bulletin. It may
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===========================================================================
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)
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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.
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