Vulnerabilities > CVE-2021-20196
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 | |
| OS | 2 |
References
- https://bugs.launchpad.net/qemu/+bug/1912780
- https://bugs.launchpad.net/qemu/+bug/1912780
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://security.netapp.com/advisory/ntap-20210708-0004/
- https://security.netapp.com/advisory/ntap-20210708-0004/
- https://www.openwall.com/lists/oss-security/2021/01/28/1
- https://www.openwall.com/lists/oss-security/2021/01/28/1