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CVE-2021-3507

Status Candidate

Overview

A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory.

Related Files

Red Hat Security Advisory 2022-7967-01
Posted Nov 15, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-7967-01 - Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Issues addressed include buffer overflow, bypass, null pointer, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-3507, CVE-2021-3611, CVE-2021-3750, CVE-2021-4158
SHA-256 | e5b756fa88106520e91abca563e807d16bb838880fef65956bfd26e61dc8090a
Red Hat Security Advisory 2022-7472-01
Posted Nov 8, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-7472-01 - Kernel-based Virtual Machine offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems. Issues addressed include buffer overflow and denial of service vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-3507, CVE-2022-0897, CVE-2022-2211, CVE-2022-23645
SHA-256 | 3a33326e513ebc4a8d3e617e75cb5bafc4c26d9dfe9e1d63479e4cd44d559a27
Ubuntu Security Notice USN-5489-1
Posted Jun 21, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5489-1 - Alexander Bulekov discovered that QEMU incorrectly handled floppy disk emulation. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly leak sensitive information. It was discovered that QEMU incorrectly handled NVME controller emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 22.04 LTS.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-3507, CVE-2021-3929, CVE-2022-0358, CVE-2022-26353, CVE-2022-26354
SHA-256 | 5e7afcf473dc350167fc86323143e719c2f4a10a84ed04040691851b4e79d4b6
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