Search Results for: Microsoft
Zero-click Windows TCP/IP RCE impacts all systems with IPv6 enabled, patch now
Microsoft warned customers this Tuesday to patch a critical TCP/IP remote code execution (RCE) vulnerability with an increased likelihood of exploitation that impacts all Windows systems using IPv6, which is enabled by default. Found by Kunlun Lab’s XiaoWei and tracked as CVE-2024-38063, this security bug is caused by an Integer Underflow weakness, which attackers could exploit to trigger buffer overflows […]
New Windows SmartScreen bypass exploited as zero-day since March
Today, Microsoft revealed that a Mark of the Web security bypass vulnerability exploited by attackers as a zero-day to bypass SmartScreen protection was patched during the June 2024 Patch Tuesday. SmartScreen is a security feature introduced with Windows 8 that protects users against potentially malicious software when opening downloaded files tagged with a Mark of […]
Malware force-installs Chrome extensions on 300,000 browsers, patches DLLs
An ongoing and widespread malware campaign force-installed malicious Google Chrome and Microsoft Edge browser extensions in over 300,000 browsers, modifying the browser’s executables to hijack homepages and steal browsing history. The installer and extensions, which are usually undetected by antivirus tools, are designed to steal data and execute commands on infected devices. The campaign was discovered by […]
New AMD SinkClose flaw helps install nearly undetectable malware
AMD is warning about a high-severity CPU vulnerability named SinkClose that impacts multiple generations of its EPYC, Ryzen, and Threadripper processors. The vulnerability allows attackers with Kernel-level (Ring 0) privileges to gain Ring -2 privileges and install malware that becomes nearly undetectable. Ring -2 is one of the highest privilege levels on a computer, running […]
Russia blocks Signal for ‘violating’ anti-terrorism laws
Russia’s telecommunications watchdog Roskomnadzor has restricted access to the Signal encrypted messaging service for what it describes as violations of Russian anti-terrorism and anti-extremism legislation. “User access to the messenger Signal is restricted due to violations of the requirements of the Russian legislation whose fulfillment is necessary to prevent the use of the messenger for […]
Black Hat USA: Wi-Fi tracking flaw puts the ‘BS’ in BSSID
LAS VEGAS — Geolocation services for a number of popular mobile hardware vendors can be used to perform widescale Wi-Fi network monitoring, according to a presentation Tuesday at the Black Hat conference here. Researcher Erik Rye of the University of Maryland said that a feature known as a Basic Service Set Identifier (BSSID) can be […]
Windows Update downgrade attack “unpatches” fully-updated systems
SafeBreach security researcher Alon Leviev revealed at Black Hat 2024 that two zero-days could be exploited in downgrade attacks to “unpatch” fully updated Windows 10, Windows 11, and Windows Server systems and reintroduce old vulnerabilities. Microsoft issued advisories on the two unpatched zero-days (tracked as CVE-2024-38202 and CVE-2024-21302) in coordination with the Black Hat talk, […]
Ransomware gang targets IT workers with new SharpRhino malware
The Hunters International ransomware group is targeting IT workers with a new C# remote access trojan (RAT) called SharpRhino to breach corporate networks. The malware helps Hunters International achieve initial infection, elevate their privileges on compromised systems, execute PowerShell commands, and eventually deploy the ransomware payload. Quorum Cyber researchers who discovered the new malware report that it […]
Windows Smart App Control, SmartScreen bypass exploited since 2018
A design flaw in Windows Smart App Control and SmartScreen that enables attackers to launch programs without triggering security warnings has been under exploitation since at least 2018. Smart App Control is a reputation-based security feature that uses Microsoft’s app intelligence services for safety predictions and Windows’ code integrity features to identify and block untrusted (unsigned) […]
CISA warns of VMware ESXi bug exploited in ransomware attacks
CISA has ordered U.S. Federal Civilian Executive Branch (FCEB) agencies to secure their servers against a VMware ESXi authentication bypass vulnerability exploited in ransomware attacks. Broadcom subsidiary VMware fixed this flaw (CVE-2024-37085) discovered by Microsoft security researchers on June 25 with the release of ESXi 8.0 U3. CVE-2024-37085 allows attackers to add a new user […]