Experts Uncover New 'CosmicStrand' UEFI Firmware Rootkit Used by Chinese Hackers

An unknown Chinese-speaking threat actor has been attributed to a new kind of sophisticated Unified Extensible Firmware Interface UEFI firmware rootkit called CosmicStrand. "The rootkit is located in the firmware images of Gigabyte or ASUS motherboards, and we noticed that all these images are...

CosmicStrand: the discovery of a sophisticated UEFI firmware rootkit

Introduction Rootkits are malware implants which burrow themselves in the deepest corners of the operating system. Although on paper they may seem attractive to attackers, creating them poses significant technical challenges and the slightest programming error has the potential to completely cras...

Debian DLA-3012-1 : libxml2 - LTS security update

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-3012 advisory. Felix Wilhelm discovered that libxml2, the GNOME XML library, did not correctly check for integer overflows or used wrong types for buffer sizes. This could result in...

Denial Of Service (DoS)

libxml2.so is vulnerable to denial of service. The xmlBufCreateSize function of buf.c does not properly check types of buffer sizes, allowing an attacker to crash the application by providing large multi-gigabyte buffers...

CVE-2022-29824

In libxml2 before 2.9.14, several buffer handling functions in buf.c xmlBuf and tree.c xmlBuffer don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer...

The command-line argument parser in tcpdump before 4.99.0 has a buffer overflow in tcpdump.c:read_infile(). To trigger this vulnerability the attacker needs to create a 4GB file on the local filesystem and to specify the file name as the value of the -F command-line argument of tcpdump.

...

CVE-2021-28708

PoD operations on misaligned GFNs This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. x86 HVM and PVH guests may be started in populate-on-demand PoD mode, to provide a way for them to later easily have more memory assigne...

glib: integer overflow in g_byte_array_new_take function when called with a buffer of 4GB or more on a 64-bit platform

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If gbytearraynewtake was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 232, causing unintended length truncation...

Gigabyte Allegedly Hit by AvosLocker Ransomware

The AvosLocker ransomware gang is claiming that it breached tech giant Gigabyte and has leaked a sample of what it claims are files stolen from the Taiwanese company’s network. It’s offering to sell the rest. On Wednesday, the gang posted a “press release” announcing that it had purportedly gutte...

Exploit for CVE-2018-19320

CVE-2018-19320 LPE Exploit Description Local Privilege Es...

OESA-2021-1107 glib2 security update

GLib is a bundle of three formerly five low-level system libraries written in C and developed mainly by GNOME. GLib's code was separated from GTK, so it can be used by software other than GNOME and has been developed in parallel ever since. Security Fixes: An issue was discovered in GNOME GLib...

AZL-6437 CVE-2021-27218 affecting package glib for versions less than 2.60.1-5

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If gbytearraynewtake was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 232, causing unintended length truncation...

UBUNTU-CVE-2021-27218

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If gbytearraynewtake was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 232, causing unintended length truncation...

In the cryptography package before 3.3.2 for Python certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow as demonstrated by the Fernet class.

...

ALPINE-CVE-2020-36242

In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class...

PT-2021-7287

Name of the Vulnerable Software and Affected Versions cryptography versions prior to 3.3.2 Description The issue is related to an integer overflow in the cryptography package for Python. This overflow can occur when certain sequences of update calls are made to symmetrically encrypt multi-GB...

Understanding Binary and Data Representation with CyberChef

A significant part of reverse engineering and attacking devices relies on viewing and recognising data in various forms and working out how to decode it. We typically use Linux tools and scripts to do this, but you can make the first few steps using a really neat online tool called CyberChef. Wha...

ALPINE-CVE-2020-27672

An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages...

freerdp: out-of-bounds read in update_read_icon_info function

In FreeRDP greater than 1.1 and before 2.0.0, there is an out-of-bounds read in updatereadiconinfo. It allows reading a attacker-defined amount of client memory 32bit unsigned - 4GB to an intermediate buffer. This can be used to crash the client or store information for later retrieval. This has...

Gigabyte Technology Gigabyte APP Center Code Execution Vulnerability

Gigabyte Technology Gigabyte APP Center is a suite of software from Gigabyte Technology Taiwan, China for managing all Gigabyte applications on your computer. A security vulnerability exists in the gdrv.sys file in Gigabyte Technology Gigabyte APP Center versions prior to 19.0227.1. An attacker...