Microsoft-signed UEFI shim bootloaders vulnerable to Secure Boot bypass

Overview Microsoft-signed UEFI bootloaders of the open-source shim project, primarily from version 0.9 and earlier, were identified as vulnerable to Secure Boot bypass. To mitigate this risk, the affected bootloaders will be added to the Microsoft UEFI Forbidden Signature Database DBX. Once the D...

Astra Linux – Vulnerability in Linux

The Linux kernel up to version 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database also known as dbx protection mechanism. This issue affects the certs/blacklist.c and certs/systemkeyring.c files...

EUVD-2020-28339

Malware in sbrugna...

CVE-2024-8105

A flaw was found in PKfail, a firmware supply-chain issue affecting hundreds of device models in the UEFI ecosystem. The Secure Boot "master key," known as the Platform Key, which manages the Secure Boot databases and maintains the chain of trust from firmware to the operating system, is often no...

Microsoft Guidance for Addressing Security Feature Bypass in Trend Micro EFI Modules

Trend Micro has released CVE-2023-28005 to address a secure boot bypass. Subsequently Microsoft has released the July Windows security updates to block the vulnerable UEFI modules by using the DBX UEFI Secure Boot Forbidden Signature Database disallow list. To exploit this vulnerability, an...

SUSE CVE-2020-26541

The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database aka dbx protection mechanism. This affects certs/blacklist.c and certs/systemkeyring.c...

August 9, 2022—KB5016683 (Security-only update)

None None...

August 9, 2022—KB5016681 (Monthly Rollup)

None None...

August 9, 2022—KB5016627 (OS Build 20348.887)

None None...

SUSE SLES12 Security Update : kernel (SUSE-SU-2022:2377-1)

The remote SUSE Linux SLES12 / SLESSAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2377-1 advisory. - The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database aka dbx protection...

SUSE: Security Advisory (SUSE-SU-2022:2173-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 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...

EulerOS 2.0 SP9 : kernel (EulerOS-SA-2022-1292)

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database aka dbx protection mechanism. This affect...

AlmaLinux 8 : kernel (ALSA-2021:2570)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:2570 advisory. - The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database aka dbx protection mechanism. This affects...

Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5210-1)

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5210-1 advisory. Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local...

USN-5106-1 linux-oem-5.10 vulnerabilities

Valentina Palmiotti discovered that the iouring subsystem in the Linux kernel could be coerced to free adjacent memory. A local attacker could use this to execute arbitrary code. CVE-2021-41073 It was discovered that the Linux kernel did not properly enforce certain types of entries in the Secure...

Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5070-1)

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5070-1 advisory. Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable...

Oracle Linux 8 : kernel (ELSA-2021-2570)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-2570 advisory. - Bluetooth: verify AMP hcichan before ampdestroy Gopal Tiwari 1962544 1962546 CVE-2021-33034 - redhat/configs: Add CONFIGSYSTEMREVOCATIONKEYS and...

Protection Bypass

The Linux kernel is vulnerable to Protection Bypass. It does not properly enforce the Secure Boot Forbidden Signature Database aka dbx protection mechanism. This affects certs/blacklist.c and certs/systemkeyring.c. A flaw was found in the Linux kernel in certs/blacklist.c, When signature entries...

CVE-2020-26541

A flaw was found in the Linux kernel in certs/blacklist.c, When signature entries for EFICERTX509GUID are contained in the Secure Boot Forbidden Signature Database, the entries are skipped. This can cause a security threat and breach system integrity, confidentiality and even lead to a denial of...

The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.

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