NULL Pointer Dereference Affecting qemu-img package, versions <15:6.2.0-11.module+el8.6.0+14707+5aa4b42d
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Test your applications- Snyk ID SNYK-CENTOS8-QEMUIMG-1957591
- published 26 Jul 2021
- disclosed 23 Jan 2021
Introduced: 23 Jan 2021
CVE-2021-20196 Open this link in a new tabHow to fix?
Upgrade Centos:8 qemu-img to version 15:6.2.0-11.module+el8.6.0+14707+5aa4b42d or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu-img package and not the qemu-img package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
References
- https://access.redhat.com/security/cve/CVE-2021-20196
- https://bugs.launchpad.net/qemu/+bug/1912780
- https://www.openwall.com/lists/oss-security/2021/01/28/1
- https://access.redhat.com/errata/RHSA-2022:1759
- https://security.netapp.com/advisory/ntap-20210708-0004/
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1919210