Security News

Microsoft: December Windows Server updates break Hyper-V VM creation
2022-12-14 12:40

Microsoft says Windows Server updates released during December's Patch Tuesday will trigger errors when trying to create new virtual machines on some Hyper-V hosts. [...]

Windows Server 2019 OOB update fixes reboots, Hyper-V, ReFS bugs
2022-01-18 23:14

Microsoft has released an emergency out-of-band update for Windows Server 2019 that fixes numerous critical bugs introduced during the January 2022 Patch Tuesday. Soon after Windows Server admins installed the January 2022 updates, they began reporting severe issues, including domain controllers entering into boot loops, Hyper-V no longer starting, L2TP VPN connections failing, and ReFS volumes becoming inaccessible.

Microsoft patches the patch that broke VPNs, Hyper-V, and left servers in boot loops
2022-01-18 11:34

Microsoft has patched the patch that broke chunks of Windows and emitted fixes for a Patch Tuesday cock-up that left servers rebooting and VPNs disconnected. On the receiving end of the company's attention were Windows desktop and Windows Server installs left a little broken following Microsoft's latest demonstration of its legendary quality control.

Admins report Hyper-V and domain controller issues after first Patch Tuesday of 2022
2022-01-13 13:17

Microsoft's first Patch Tuesday of 2022 has, for some folk, broken Hyper-V and sent domain controllers into boot loops. As well as the broken Hyper-V, popular tech blog Born City noted problems with boot loops on domain controllers, with other versions of Windows Server affected.

New Windows Server updates cause DC boot loops, break Hyper-V
2022-01-12 19:53

The latest Windows Server updates are causing severe issues for administrators, with domain controllers having spontaneous reboots, Hyper-V not starting, and inaccessible ReFS volumes until the updates are rolled back. The most serious issue introduced by these updates is that Windows domain controllers enter a boot loop, with servers getting into an endless cycle of Windows starting and then rebooting after a few minutes.

Researchers Publish Details on Recent Critical Hyper-V Vulnerability
2021-07-29 17:02

Security researchers at Guardicore Labs are sharing details of a critical vulnerability in Hyper-V that Microsoft patched in May 2021. Tracked as CVE-2021-28476 with a CVSS score of 9.9, the security vulnerability impacts Hyper-V's virtual network switch driver and could be exploited to achieve remote code execution or cause a denial of service condition.

Critical Microsoft Hyper-V bug could haunt orgs for a long time
2021-07-28 13:30

The bug is in Hyper-V's network switch driver and affects Windows 10 and Windows Server 2012 through 2019. The two researchers found the bug together and disclosed it privately to Microsoft.

This November, give thanks for only having one exploited Microsoft flaw for Patch Tues. And four Hyper-V escapes
2019-11-12 22:19

Intel joins the fun with monthly releases from Adobe, SAP Patch Tuesday The November edition of Patch Tuesday has landed with scheduled updates from Microsoft, Adobe, and SAP, along with the debut...

Reverse RDP Attack Also Enables Guest-to-Host Escape in Microsoft Hyper-V
2019-08-07 23:03

Remember the reverse RDP attack? Earlier this year, researchers disclosed clipboard hijacking and path-traversal issues in Microsoft's Windows built-in RDP client that could allow a malicious RDP...

Zerodium Offers $500,000 for VMware ESXi, Microsoft Hyper-V Exploits
2019-03-08 07:11

Exploit acquisition firm Zerodium this week announced that it’s prepared to pay up to $500,000 for VMware ESXi and Microsoft Hyper-V vulnerabilities. read more