Analyzing open-source bootloaders: Finding vulnerabilities faster with AI

By leveraging Microsoft Security Copilot to expedite the vulnerability discovery process, Microsoft Threat Intelligence uncovered several vulnerabilities in multiple open-source bootloaders, impacting all operating systems relying on Unified Extensible Firmware Interface UEFI Secure Boot as well ...

grub2: net: Out-of-bounds write in grub_net_search_config_file()

A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grubstrcpy function. During this step, it fails to consider the environment variable length...

B&R Industrial Automation B&R APROL 访问控制错误漏洞

B&R Industrial Automation B&R APROL is a process control system from B&R Industrial Automation, Austria. An access control error vulnerability exists in B&R Industrial Automation B&R APROL versions prior to 4.4-01, which stems from a lack of critical function authentication in the GRUB...

grub2: net: Out-of-bounds write in grub_net_search_config_file()

A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grubstrcpy function. During this step, it fails to consider the environment variable length...

CVE-2024-56336

A vulnerability has been identified in SINAMICS S200 All versions with serial number beginning with SZVS8, SZVS9, SZVS0 or SZVSN and the FS number is 02. The affected device contains an unlocked bootloader. This security oversight enables attackers to inject malicious code, or install untrusted...

grub2: net: Out-of-bounds write in grub_net_search_config_file()

A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grubstrcpy function. During this step, it fails to consider the environment variable length...

CVE-2024-56336

A vulnerability has been identified in SINAMICS S200 All versions with serial number beginning with SZVS8, SZVS9, SZVS0 or SZVSN and the FS number is 02. The affected device contains an unlocked bootloader. This security oversight enables attackers to inject malicious code, or install untrusted...

CVE-2024-56336

A vulnerability has been identified in SINAMICS S200 All versions with serial number beginning with SZVS8, SZVS9, SZVS0 or SZVSN and the FS number is 02. The affected device contains an unlocked bootloader. This security oversight enables attackers to inject malicious code, or install untrusted...

CVE-2024-56336

A vulnerability has been identified in SINAMICS S200 All versions with serial number beginning with SZVS8, SZVS9, SZVS0 or SZVSN and the FS number is 02. The affected device contains an unlocked bootloader. This security oversight enables attackers to inject malicious code, or install untrusted...

CVE-2024-56336

The CVE-2024-56336 issue affects Siemens SINAMICS S200 devices with serial prefixes SZVS8/SZVS9/SZVS0/SZVSN and FS 02, where an unlocked bootloader enables injection of malicious code or installation of untrusted firmware. The vulnerability stems from the unsecured bootloader, compromising device...

Siemens SINAMICS S200 授权问题漏洞

The Siemens SINAMICS S200 is a single-axis AC servo drive system from Siemens, Germany. An authorization issue vulnerability exists in the Siemens SINAMICS S200 that originates from an unlocked bootloader and could allow an attacker to inject malicious code or install untrusted firmware...

Siemens SINAMICS S200

SUMMARY A specific range of produced SINAMICS S200 devices contains an unlocked bootloader vulnerability that could allow an attacker to download untrusted firmware that could damage or compromise the device. For delivered products listed below Siemens recommends countermeasures. 2. GENERAL...

GNU GRUB2 Buffer Overflow Vulnerability

GNU GRUB2 is an open source bootloader used to load the operating system kernel when the computer boots. GNU GRUB2 suffers from a buffer overflow vulnerability that originates from an integer overflow when reading data from the squash4 file system. An attacker can exploit this vulnerability to...

Linux Distros Unpatched Vulnerability : CVE-2022-34302

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in New Horizon Datasys bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In...

Linux Distros Unpatched Vulnerability : CVE-2022-34303

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in Eurosoft bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In order to lo...

CVE-2025-0678

A flaw was found in grub2. When reading data from a squash4 filesystem, grub's squash4 fs module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some ...

DEBIAN-CVE-2024-45782

A flaw was found in the HFS filesystem. When reading an HFS volume's name at grubfsmount, the HFS filesystem driver performs a strcpy using the user-provided volume name as input without properly validating the volume name's length. This issue may read to a heap-based out-of-bounds writer,...

DEBIAN-CVE-2025-1125

When reading data from a hfs filesystem, grub's hfs filesystem module uses user-controlled parameters from the filesystem metadata to calculate the internal buffers size, however it misses to properly check for integer overflows. A maliciouly crafted filesystem may lead some of those buffer size...

DEBIAN-CVE-2025-0689

When reading data from disk, the grub's UDF filesystem module utilizes the user controlled data length metadata to allocate its internal buffers. In certain scenarios, while iterating through disk sectors, it assumes the read size from the disk is always smaller than the allocated buffer size whi...

AZL-57552 CVE-2024-45779 affecting package grub2 for versions less than 2.06-15

An integer overflow flaw was found in the BFS file system driver in grub2. When reading a file with an indirect extent map, grub2 fails to validate the number of extent entries to be read. A crafted or corrupted BFS filesystem may cause an integer overflow during the file reading, leading to a he...