Patching Archives

Winsage

June 16, 2025

Microsoft: June Windows Server security updates cause DHCP issues

Microsoft has identified an issue with the June 2025 security updates that causes the Dynamic Host Configuration Protocol (DHCP) service to freeze on certain Windows Server systems. This affects the service's ability to apply renewals of unicast IP addresses, impacting network operations. Microsoft has acknowledged that the DHCP Server service may intermittently stop responding after the update and is working on a resolution. Additionally, other issues affecting Windows Server systems have been addressed, including application failures and authentication problems on domain controllers. Out-of-band updates were previously issued to fix bugs causing Hyper-V virtual machines to restart or freeze, and emergency updates were released for issues with Windows containers on certain Windows Server versions.

Winsage

June 11, 2025

Microsoft Windows Secure Boot Bypass Confirmed

The second Tuesday of each month is when Microsoft releases monthly security updates for Windows. A significant zero-day vulnerability, CVE-2025-3052, has been identified, affecting all Windows users and allowing a Secure Boot bypass. This vulnerability could compromise system integrity by enabling malware to infiltrate Windows PCs and servers. CVE-2025-3052 is classified as a memory corruption issue within a module signed with Microsoft’s third-party UEFI certificate and can execute unsigned code during the boot process, potentially allowing attackers to install bootkits.

Winsage

June 11, 2025

Microsoft warns of 66 flaws to fix for this Patch Tuesday

Microsoft has announced a significant update addressing 66 vulnerabilities, including a zero-day vulnerability disclosed on the same day. Ten critical patches have been identified, with two currently being exploited. Microsoft is also patching older platforms like Windows Server 2008 and Internet Explorer. One critical vulnerability, CVE-2025-33053, has been exploited by the Stealth Falcon hacking group since March, allowing remote code execution via the WebDAV extension. Another critical vulnerability, CVE-2025-5419, affects the Chromium V8 JavaScript engine in Microsoft Edge. CVE-2025-33073 is an escalation of privilege vulnerability in the Windows SMB Client, with a CVSS score of 8.8. Four critical vulnerabilities in Microsoft Office include CVE-2025-47162, CVE-2025-47164, CVE-2025-47167, and CVE-2025-47953. Four critical remote code execution vulnerabilities include CVE-2025-47172, CVE-2025-29828, CVE-2025-32710, and CVE-2025-33071. Two elevation-of-privilege flaws are CVE-2025-47966 and CVE-2025-33070. Adobe has prioritized fixes for Adobe Commerce and Adobe's Experience Manager, addressing 254 CVEs. Adobe Acrobat users will receive ten fixes, including four critical ones. Fortinet has patched CVE-2023-42788 in FortiAnalyzer 7.4. SAP resolved 14 issues, with CVE-2025-42989 being the only critical patch, associated with the NetWeaver Application Server and a CVSS score of 9.6.

Tech Optimizer

June 5, 2025

CISA releases TTPs & IoCs for Play Ransomware That Hacked 900+ Orgs

The Cybersecurity and Infrastructure Security Agency (CISA), in collaboration with the FBI and the Australian Cyber Security Centre, released an advisory on the Play ransomware group, which has targeted around 900 entities since its inception in June 2022. The group employs a double extortion model, exploiting vulnerabilities in public-facing applications and using tools for lateral movement and credential dumping. Their operations involve recompiling ransomware binaries for each attack to evade detection. The advisory highlights mitigation measures such as multifactor authentication and regular software patching. The Play ransomware specifically targets virtual environments and encrypts files using AES-256 encryption. Indicators of Compromise (IoCs) include: - SVCHost.dll (Backdoor) - SHA-256: 47B7B2DD88959CD7224A5542AE8D5BCE928BFC986BF0D0321532A7515C244A1E - Backdoor - SHA-256: 75B525B220169F07AECFB3B1991702FBD9A1E170CAF0040D1FCB07C3E819F54A - PSexesvc.exe (Custom Play “psexesvc”) - SHA-256: 1409E010675BF4A40DB0A845B60DB3AAE5B302834E80ADEEC884AEBC55ECCBF7 - HRsword.exe (Disables endpoint protection) - SHA-256: 0E408AED1ACF902A9F97ABF71CF0DD354024109C5D52A79054C421BE35D93549 - Hi.exe (Associated with ransomware) - SHA-256: 6DE8DD5757F9A3AC5E2AC28E8A77682D7A29BE25C106F785A061DCF582A20DC6

Winsage

May 30, 2025

Microsoft May Patch Tuesday fails on some Windows 11 VMs

Microsoft's recent Patch Tuesday update for Windows 11 has faced significant issues, particularly affecting users on versions 22H2 and 23H2. The installation of the May 13 update is failing on some machines, especially in virtual environments, leading to recovery mode entries and boot errors. Users are advised to avoid the update temporarily. The error message indicates a problem with the ACPI.sys file, which is crucial for managing hardware resources. Windows 11 Home and Pro users are likely unaffected, as virtual machines are typically used in enterprise settings. Microsoft has not provided the number of impacted users or a workaround beyond uninstalling the patches, but engineers are working on a resolution. This incident follows previous patching challenges faced by Microsoft this year, including an emergency update for Windows 10 and issues with Remote Desktop sessions in earlier updates.

Winsage

May 15, 2025

Windows Remote Desktop Gateway Vulnerability Let Attackers Trigger Dos Condition

The Microsoft Security Response Center (MSRC) has released critical security updates to address a significant vulnerability in the Windows Remote Desktop Gateway service, identified as CVE-2025-26677, which allows unauthorized attackers to cause denial of service (DoS) conditions. This vulnerability is rated as "High" severity with a CVSS score of 7.5 and affects multiple versions of Windows Server, including 2016, 2019, 2022, and 2025. Microsoft has provided security updates (KB5058383, KB5058392, KB5058385, and KB5058411) to rectify the issue. Additionally, another vulnerability, CVE-2025-29831, has been identified that could enable remote code execution (RCE) through a Use After Free weakness, also rated with a CVSS score of 7.5. This vulnerability requires user interaction, specifically an admin user to stop or restart the service, and affects Windows Server versions 2008 R2, 2012/R2, 2016, 2019, 2022, and 2025. Organizations are advised to prioritize patching both vulnerabilities and to review network configurations to limit exposure of Remote Desktop Gateway services. The vulnerabilities were discovered by security researchers from Kunlun Lab.

Winsage

May 14, 2025

Microsoft Scripting Engine 0-Day Vulnerability Enables Remote Code Execution Over Network

Microsoft has identified a memory corruption vulnerability in its Scripting Engine, designated as CVE-2025-30397. This vulnerability allows unauthorized remote code execution and is classified as “Important” under CWE-843 (Type Confusion). It was disclosed in the May 2025 Patch Tuesday updates and arises from improper handling of resource types. Exploitation occurs when a user clicks a specially crafted URL in Microsoft Edge's Internet Explorer Mode, potentially compromising system confidentiality, integrity, and availability. Although the attack complexity is high, successful exploitation has been confirmed in the wild. Microsoft has issued patches for all supported Windows versions, and users are advised to apply these updates and consider disabling Internet Explorer Mode to reduce risk.

Winsage

May 14, 2025

Windows DWM 0-Day Vulnerability Allows Attackers to Escalate Privileges

Microsoft has addressed a zero-day vulnerability in the Windows Desktop Window Manager (DWM) Core Library, identified as CVE-2025-30400, which allows attackers to gain SYSTEM-level privileges on affected systems. This "Elevation of Privilege" vulnerability, arising from a "use-after-free" memory corruption issue, was actively exploited prior to the release of a patch on May 13, 2025. The vulnerability permits an authorized attacker to execute code with SYSTEM privileges by exploiting improper memory management within the DWM process. Microsoft classified the severity of this vulnerability as "Important" and assigned it a CVSS score of 7.8. Users and administrators are strongly advised to apply the latest updates to mitigate the risk of exploitation.

Winsage

May 8, 2025

Windows 0-Day Vulnerability Exploited in Wild to Deploy Play ransomware

Threat actors associated with the Play ransomware operation exploited a zero-day vulnerability in Microsoft Windows, identified as CVE-2025-29824, before a patch was released on April 8, 2025. This vulnerability affects the Windows Common Log File System (CLFS) driver, allowing attackers to elevate their privileges to full system access. The Play ransomware group targeted an unnamed organization in the United States, likely gaining initial access through a public-facing Cisco Adaptive Security Appliance (ASA). During this intrusion, no ransomware payload was deployed; instead, the attackers used a custom information-stealing tool named Grixba. Microsoft attributed this activity to the threat group Storm-2460, known for deploying PipeMagic malware. The exploitation affected various sectors, including IT, real estate in the U.S., finance in Venezuela, software in Spain, and retail in Saudi Arabia. The vulnerability received a CVSS score of 7.8 and was addressed in Microsoft's April 2025 Patch Tuesday updates. The attack involved creating files in the path C:ProgramDataSkyPDF, injecting a DLL into the winlogon.exe process, extracting credentials from LSASS memory, creating new administrator users, and establishing persistence. The Play ransomware group has been active since June 2022 and employs double-extortion tactics. Organizations are urged to apply the security updates released on April 8, 2025, especially for vulnerable Windows versions, while Windows 11 version 24H2 is not affected due to existing security mitigations.

Winsage

May 7, 2025

Play ransomware affiliate leveraged zero-day to deploy malware

The Play ransomware gang exploited a critical vulnerability in the Windows Common Log File System, identified as CVE-2025-29824, which has a CVSS score of 7.8 and is categorized as a "Use after free" vulnerability. This flaw allows an authorized attacker to elevate privileges locally and has been confirmed to be exploited in real-world attacks. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added it to its Known Exploited Vulnerabilities catalog in April. Microsoft addressed this vulnerability during its April Patch Tuesday security updates, acknowledging its exploitation in limited attacks targeting various sectors in the U.S. and Saudi Arabia. Researchers from Symantec reported that the Play ransomware gang used the CVE-2025-29824 exploit in an attack against a U.S. organization before the public disclosure and patching of the vulnerability. The attackers utilized the Grixba infostealer tool and initially exploited a public-facing Cisco ASA firewall to gain entry. They deployed tools to gather information, escalated privileges using the CVE-2025-29824 exploit, and executed malicious scripts to steal credentials. The exploit took advantage of race conditions in driver memory handling, allowing kernel access and manipulation of files. Before the patch was released, the exploit was reportedly used by multiple threat actors, and Microsoft linked it to other malware.