Citrix Hypervisor Security Bulletin for CVE-2023-23583 and CVE-2023-46835

Description of Problem An issue has been discovered that affects Citrix Hypervisor 8.2 CU1 LTSR and may allow malicious privileged code in a guest VM to compromise an AMD-based host via a passed through PCI device CVE-2023-46835. In addition, Intel has disclosed a security issue affecting certain...

CVE-2023-20592

A flaw was found in some of AMD CPU's due to improper or unexpected behavior of the INVD. This issue may allow an attacker with a malicious hypervisor to affect cache line write-back behavior of the CPU, potentially leading to a loss of guest virtual machine VM memory integrity. Mitigation...

RHEL 7 : linux-firmware (RHSA-2023:7244)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7244 advisory. The linux-firmware packages contain all of the firmware files that are required by various devices to operate. Security Fixes: hw amd: Retur...

Input validation

Improper or unexpected behavior of the INVD instruction in some AMD CPUs may allow an attacker with a malicious hypervisor to affect cache line write-back behavior of the CPU leading to a potential loss of guest virtual machine VM memory integrity...

CVE-2023-20592

Improper or unexpected behavior of the INVD instruction in some AMD CPUs may allow an attacker with a malicious hypervisor to affect cache line write-back behavior of the CPU leading to a potential loss of guest virtual machine VM memory integrity...

RHEL 8 : linux-firmware (RHSA-2023:7109)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2023:7109 advisory. The linux-firmware packages contain all of the firmware files that are required by various devices to operate. Security Fixes: hw amd: Return Address...

Huawei EulerOS: Security Advisory for linux-firmware (EulerOS-SA-2023-3137)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2023 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...

RHEL 9 : linux-firmware (RHSA-2023:6595)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:6595 advisory. The linux-firmware packages contain all of the firmware files that are required by various devices to operate. Security Fixes: hw: intel:...

iLeakage: New Safari Exploit Impacts Apple iPhones and Macs with A- and M-Series CPUs

A group of academics has devised a novel side-channel attack dubbed iLeakage that exploits a weakness in the A- and M-series CPUs running on Apple iOS, iPadOS, and macOS devices, enabling the extraction of sensitive information from the Safari web browser. "An attacker can induce Safari to render...

Oracle Linux 9 : linux-firmware (ELSA-2023-5068)

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2023-5068 advisory. 20230516-999.27.git6c9e0ed5.el9 - Update firmware for qat4xxx devices Orabug: 35811008 20230516-999.26.git6c9e0ed5.el9 - Run dracut -f in %posttrans instead of...

Ubuntu 22.04 LTS : Linux kernel (Raspberry Pi) vulnerabilities (USN-6416-3)

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6416-3 advisory. It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker...

Oracle Linux 8 : Unbreakable Enterprise kernel-container (ELSA-2023-12911)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-12911 advisory. - x86: KVM: SVM: always update the x2avic msr interception Maxim Levitsky Orabug: 35857366 CVE-2023-5090 - netfilter: ipset: add the missing...

Xen Security Vulnerabilities

Xen is an open source virtual machine monitor product from the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same computer and supports runtime migration to ensure uptime and avoid downtime. A security vulnerability exists in Xen that...

Xen: x86/AMD: Debug Mask handling (XSA-444)

AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. - CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previo...

hw: amd: Cross-Process Information Leak

A flaw was found in hw, in “Zen 2” CPUs. This issue may allow an attacker to access sensitive information under specific microarchitectural circumstances...

Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-6416-2)

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6416-2 advisory. It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker...

CVE-2023-5370 arm64 boot CPUs may lack speculative execution protections

On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0...

CVE-2023-5370 arm64 boot CPUs may lack speculative execution protections

On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0...

Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6416-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6416-1 advisory. It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A...

Ubuntu 22.04 LTS : Linux kernel (OEM) vulnerabilities (USN-6415-1)

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6415-1 advisory. Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow...