Huntress is seeing threat actors exploit React2Shell (CVE-2025-55182) to deploy a Linux backdoor, a reverse proxy tunnel, and a Go-based post-exploitation implant.
Posted by Liz Prucka, Hamzeh Zawawy, Rishika Hooda, Android Security and Privacy Team Last year, Google's Android Red Team partnered with Arm to conduct an in-depth security analysis of the Mali GPU, a component used in billions of Android devices worldwide. This collaboration was a significant step in proactively identifying and fixing vulnerabilities in the GPU software and firmware stack. While finding and fixing individual bugs is crucial, and progress continues on eliminating them entirely…
Posted by Jeff Vander Stoep, Android Last year, we wrote about why a memory safety strategy that focuses on vulnerability prevention in new code quickly yields durable and compounding gains. This year we look at how this approach isn’t just fixing things, but helping us move faster. The 2025 data continues to validate the approach, with memory safety vulnerabilities falling below 20% of total vulnerabilities for the first time. Updated data for 2025. This data covers first-party and third-party…
Discover how attackers could manipulate the Linux /proc filesystem to hide malicious processes and distort forensic timelines. This technical deep dive highlights examples of command-line substitution and start time corruption, and offers detection and defense strategies for incident responders and security analysts.
One year from now, with the release of Chrome 154 in October 2026, we will change the default settings of Chrome to enable “Always Use Secure Connections”. This means Chrome will ask for the user's permission before the first access to any public site without HTTPS. The “Always Use Secure Connections” setting warns users before accessing a site without HTTPS Chrome Security's mission is to make it safe to click on links. Part of being safe means ensuring that when a user types a URL or clicks o…
Posted by Dave Kleidermacher, VP Engineering, Android Security & Privacy Today marks a watershed moment and new benchmark for open-source security and the future of consumer electronics. Google is proud to announce that protected KVM (pKVM), the hypervisor that powers the Android Virtualization Framework, has officially achieved SESIP Level 5 certification. This makes pKVM the first software security system designed for large-scale deployment in consumer electronics to meet this assurance bar. …
Deep dive into UNC2891’s multi‑stage bank intrusion: Raspberry Pi ATM implant, bind mount evasion, Dynamic DNS C2, and a CAKETAP move toward HSM manipulation.
Discover how attackers leverage Windows Kernel loaders and abuse digitally signed drivers to gain privileged access, disable security tools, and stealthily maintain control — bypassing traditional defenses and enabling advanced threat operations.
Security advisories were issued for FreeRTOS and coreSNTP releases containing unintended scripts that could potentially transmit AWS credentials if executed on Linux/macOS. Affected releases have been removed and users are advised to rotate credentials and delete downloaded copies.
Learn how attackers exploit Pluggable Authentication Modules (PAM) for credential harvesting—and discover defenses to harden Linux authentication.
A critical vulnerability in AZNFS-mount utility, preinstalled on Azure HPC/AI images, allowed unprivileged users to escalate privileges to root on Linux machines. The flaw existed in versions up to 2.0.10 and involved a SUID binary. Azure classified it as low severity but fixed it in version 2.0.11.
In this blog, we observed how the Cicada3301 Ransomware-as-a-Service (RaaS) group operates, detailing the workflow of their affiliates within the panel and examining the Windows, Linux, ESXi, and PowerPC variants of the ransomware.
Group-IB explores methods of process visibility evasion through /proc filesystem manipulation in Linux, along with effective defenses to counteract these tactics.
This piece of malware has an insatiable appetite. Group-IB's Threat Intelligence unit offers their insights on the new RAT used in attacks against Thai companies.
A vulnerability in Azure Function Apps allowed extraction of Managed Identity credentials from the encrypted startup context of Linux containers. This gave attackers with container access the ability to persist as the Managed Identity, breaking the intended security model. Microsoft has since patched the issue by encrypting the sensitive payload.
Undocumented APIs used by the Azure Function Apps Portal could have allowed an attacker with existing access to a Reader role on a Function App to escalate their privileges and gain write permissions through arbitrary file reads on Function App containers. For Windows containers, this would only grant an attacker the ability to extract ASP.NET encryption keys (the impact of which remains unclear), but for Linux containers it would have allowed an attacker to read environmental variables contain…
In Azure Serverless Functions, a new container is generated by the host for every function, which is then terminated and deleted after several minutes. Palo Alto discovered that an API call was available to bind one path to another within the container (called "init_server_pkg_mount_BindMount") that could be called by a low-privileged user but executed with root privileges. This could enable a malicious tenant to escalate their privileges to root, and then escape their container by abusing the …
A vulnerability in Service Fabric allows Linux containers to escalate their privileges in order to gain root privileges on the node, and then compromise all of the nodes in the cluster. An attacker would need to have read/write access to the cluster, and the vulnerability could be exploited on containers that are configured to have runtime access, but this is granted by default to every container. Though the bug exists in both the Windows and Linux versions, it is only exploitable on Linux.
Azure forces the install of an agent on Linux VMs, which contained a vulnerability that allowed privilege escalation (note that this vulnerability is different than OMIGOD, which also resided in the OMI agent).
Several cloud desktop solutions rely on a 3rd-party library called Eltima SDK to provide USB over Ethernet capabilities, to allow users to connect and share local devices such as webcams. SentinelLabs discovered vulnerabilities in Eltima drivers, including proprietary versions used by several cloud services (among them AWS Workspaces), that would allow unprivileged users to escalate privileges to kernel mode.
Azure forces the install of an agent on Linux VMs, which contained a vulnerability that would grant root RCE if an attacker could send a web request to them. Initially, Microsoft did not update the agent automatically, and so customers had to patch manually, but a few days later they began patching some services remotely.
A vulnerability in the Azure Linux VM extension mechanism allowed an unprivileged user to leak any Azure VM extension’s private data. An attacker could have abused this to gain credentials for the VM itself as well as credentials for extensions associated with the VM. Paired with the design of the VMAccess extension (an official Azure extension for managing VM credentials), this could have been used to achieve privilege escalation, as an unprivileged attacker would have been able to elevate the…
Full administrative access to the Azure Red Hat Enterprise Linux Appliance REST API was publicly exposed. It allowed malicious actors uploading packages that would be acquired by client virtual machines on their next yum update. The vulnerable infrastructure supplies all the packages for all Red Hat Enterprise Linux instances booted from the Azure marketplace.
