Windows Server - Security Ticks

Microsoft fixes actively exploited Windows Hyper-V zero-day flaws

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Microsoft fixes actively exploited Windows Hyper-V zero-day flaws 2025-01-14 at 23:03 By Zeljka Zorz Microsoft has marked January 2025 Patch Tuesday with a hefty load of patches: 157 CVE-numbered security issues have been fixed in various products, three of which (in Hyper-V) are being actively exploited. The exploited Hyper-V vulnerabilities The exploited zero-days are CVE-2025-21333 […]

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Microsoft enforces defenses preventing NTLM relay attacks

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Microsoft enforces defenses preventing NTLM relay attacks 2024-12-11 at 15:03 By Zeljka Zorz Since making Kerberos the default Windows authentication protocol in 2000, Microsoft has been working on eventually retiring NTLM, its less secure and obsolete counterpart. Until NTLM gets disabled by default, Microsoft is working on shoring up defenses against NTLM relay attacks. How

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Microsoft fixes exploited zero-day (CVE-2024-49138)

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Microsoft fixes exploited zero-day (CVE-2024-49138) 2024-12-10 at 23:04 By Zeljka Zorz On December 2024 Patch Tuesday, Microsoft resolved 71 vulnerabilities in a variety of its products, including a zero-day (CVE-2024-49138) that’s been exploited by attackers in the wild to execute code with higher privileges. CVE-2024-49138 exploited by attackers CVE-2024-49138 stems from a heap-based buffer overflow

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How a Windows zero-day was exploited in the wild for months (CVE-2024-43451)

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How a Windows zero-day was exploited in the wild for months (CVE-2024-43451) 2024-11-14 at 12:02 By Zeljka Zorz CVE-2024-43451, a Windows zero-day vulnerability for which Microsoft released a fix on November 2024 Patch Tuesday, has been exploited since at least April 2024, ClearSky researchers have revealed. About the vulnerability CVE-2024-43451 affects all supported Windows versions

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Microsoft fixes actively exploited zero-days (CVE-2024-43451, CVE-2024-49039)

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Microsoft fixes actively exploited zero-days (CVE-2024-43451, CVE-2024-49039) 2024-11-12 at 23:03 By Zeljka Zorz November 2024 Patch Tuesday is here, and Microsoft has dropped fixes for 89 new security issues in its various products, two of which – CVE-2024-43451 and CVE-2024-49039 – are actively exploited by attackers. The exploited vulnerabilities (CVE-2024-43451, CVE-2024-49039) CVE-2024-43451 is yet another

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Windows Server 2025 gets hotpatching option, without reboots

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Windows Server 2025 gets hotpatching option, without reboots 2024-09-23 at 17:02 By Zeljka Zorz Organizations that plan to upgrade to Windows Server 2025 once it becomes generally available will be able to implement some security updates by hotpatching running processes. What is hotpatching? “Hotpatching has been around for years in Windows Server 2022 Azure Edition,

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“Perfect” Windows downgrade attack turns fixed vulnerabilities into zero-days

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“Perfect” Windows downgrade attack turns fixed vulnerabilities into zero-days 2024-08-08 at 13:01 By Zeljka Zorz A researcher has developed a downgrade attack that can make Windows machines covertly, persistently and irreversibly vulnerable, even if they were fully patched before that. A downgrade attack exploiting the Windows Update process The direction of SafeBreach researcher Alon Leviev’s

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Microsoft releases tool to speed up recovery of systems borked by CrowdStrike update

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Microsoft releases tool to speed up recovery of systems borked by CrowdStrike update 2024-07-22 at 15:16 By Zeljka Zorz By now, most people are aware of – or have been personally affected by – the largest IT outage the world have ever witnessed, courtesy of a defective update for Crowdstrike Falcon Sensors that threw Windows

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A zero-day vulnerability (and PoC) to blind defenses relying on Windows event logs

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A zero-day vulnerability (and PoC) to blind defenses relying on Windows event logs 2024-01-31 at 18:31 By Zeljka Zorz A zero-day vulnerability that, when triggered, could crash the Windows Event Log service on all supported (and some legacy) versions of Windows could spell trouble for enterprise defenders. Discovered by a security researcher named Florian and

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November 2023 Patch Tuesday forecast: Year 21 begins

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November 2023 Patch Tuesday forecast: Year 21 begins 10/11/2023 at 09:03 By Help Net Security The October forecast for large numbers of CVEs addressed in Windows 10 and 11 and the recent record on the number fixed in Windows Server 2012 was spot on! Microsoft addressed 75 CVEs in Windows 11, 80 in Windows 10,

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