CVE-2021-4206

A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursoralloc function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on th...

CVE-2021-4206

CVE-2021-4206 affects the QEMU QXL display device emulation. An integer overflow in cursor_alloc() can cause a small cursor object to be allocated and then trigger a heap-based buffer overflow, enabling a privileged guest user to crash the QEMU process on the host or potentiallyExecute arbitrary ...

CVE-2021-3638

An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati2dblt routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QE...

Ubuntu 18.04 LTS / 20.04 LTS : QEMU vulnerabilities (USN-5307-1)

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5307-1 advisory. Gaoning Pan discovered that QEMU incorrectly handled the floppy disk emulator. An attacker inside the guest could use this issue to cause QEM...

CVE-2021-3930

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in modesensepage if the 'page' argument was set to MODEPAGEALLS 0x3f. A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service conditio...

VMware Workstation, Fusion and ESXi updates address a heap-overflow vulnerability (CVE-2021-22045)

3. VMware Workstation, Fusion and ESXi updates address a heap-overflow vulnerability CVE-2021-22045 The CD-ROM device emulation in VMware Workstation, Fusion and ESXi has a heap-overflow vulnerability. VMware has evaluated the severity of this issue to be in the Important severity range with a...

SUSE SLES12: qemu / qemu-arm / qemu-block-curl / qemu-block-iscsi / etc (SUSE-SU-2021:3653-1)

The remote SUSE Linux SLES12 / SLESSAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3653-1 advisory. Security issues fixed: - Fix out-of-bounds write in UAS USB Attached SCSI device emulation bsc1189702, CVE-2021-3713 - Fix heap...

SUSE: Security Advisory (SUSE-SU-2021:3653-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

SUSE-SU-2021:3613-1 Security update for qemu

This update for qemu fixes the following issues: Security issues fixed: - Fix heap use-after-free in virtionetreceivercu bsc1189938, CVE-2021-3748 - Fix out-of-bounds write in UAS USB Attached SCSI device emulation bsc1189702, CVE-2021-3713 - usbredir: free call on invalid pointer in bufpalloc...

openSUSE: Security Advisory for qemu (openSUSE-SU-2021:3604-1)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

Debian DSA-4980-1 : qemu - security update

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4980 advisory. Multiple security issues were discovered in QEMU, a fast processor emulator, which could result in denial of service or the the execution of arbitrary code. For t...

CVE-2021-3713

An out-of-bounds write flaw was found in the UAS USB Attached SCSI device emulation of QEMU. The device uses the guest supplied stream number unchecked, which can lead to out-of-bounds access to the UASDevice-data3 and UASDevice-status3 fields. A malicious guest user could use this flaw to crash...

An EPYC escape: Case-study of a KVM breakout

Posted by Felix Wilhelm, Project Zero Introduction KVM for Kernel-based Virtual Machine is the de-facto standard hypervisor for Linux-based cloud environments. Outside of Azure, almost all large-scale cloud and hosting providers are running on top of KVM, turning it into one of the fundamental...

OPENSUSE-SU-2021:0600-1 Security update for qemu

This update for qemu fixes the following issues: - CVE-2020-12829: Fix OOB access in sm501 device emulation bsc1172385 - CVE-2020-25723: Fix use-after-free in usb xhci packet handling bsc1178934 - CVE-2020-25084: Fix use-after-free in usb ehci packet handling bsc1176673 - CVE-2020-25625: Fix...

SUSE-SU-2021:1242-1 Security update for qemu

This update for qemu fixes the following issues: - Fix OOB access in sm501 device emulation CVE-2020-12829, bsc1172385 - Fix OOB access possibility in MegaRAID SAS 8708EM2 emulation CVE-2020-13362 bsc1172383 - Fix use-after-free in usb xhci packet handling CVE-2020-25723, bsc1178934 - Fix...

QEMU 资源管理错误漏洞

QEMU Quick Emulator is a set of simulation processor software by Fabrice Bellard, a French individual developer. The software is fast and cross-platform. QEMU ESP Device Emulation has a security vulnerability that can be exploited by an attacker to allow the use of multiple exploits via device...

EulerOS Virtualization 2.9.0 : qemu (EulerOS-SA-2021-1763)

According to the versions of the qemu packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - ideatapicmdreplyend in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer index is not validated...

QEMU heap buffer overflow vulnerability (CNVD-2021-09804)

QEMU is a set of simulation processors written by Fabrice Bellard and distributed with source code under the GPL license, widely used on the GNU/Linux platform. QEMU 5.0.0 and earlier versions of SDHCI device emulation support suffer from a heap buffer overflow vulnerability when performing a...

Breaking Samsung firmware, or turning your S8/S9/S10 into a DIY “Proxmark”

This post is a companion to the DEF CON 28 video available here Breaking the Firmware of Samsung’s NFC Chips Recently I have been looking into how to push the capabilities of my old smartphones beyond what you could traditionally do just by rooting it. Smartphones contain huge amounts of hardware...

CVE-2020-17380

A flaw was found in QEMU. A heap-based buffer overflow vulnerability was found in the SDHCI device emulation support allowing a guest user or process to crash the QEMU process on the host resulting in a denial of service condition, or potentially execute arbitrary code with privileges of the QEMU...