Microsoft Patch Tuesday for January 2023 fixed actively exploited zero-day

Microsoft Patch Tuesday security updates for January 2023 fixed 97 flaws and an actively exploited zero-day.

Microsoft Patch Tuesday security updates for January 2023 addressed a total of 98 vulnerabilities in Microsoft Windows and Windows Components; Office and Office Components; .NET Core and Visual Studio Code, 3D Builder, Azure Service Fabric Container, Windows BitLocker, Windows Defender, Windows Print Spooler Components, and Microsoft Exchange Server.

11 vulnerabilities are rated Critical and 87 are rated Important in severity. 25 of these flaws were submitted through the Zero Day Initiative program.

One of the flaws addressed this month, tracked as CVE-2023-21674 (CVSS score 8.8), is listed as being in the wild at the time of release. The flaw is a Windows Advanced Local Procedure Call (ALPC) elevation of privilege vulnerability that could lead to a browser sandbox escape. An attacker can exploit this vulnerability to gain SYSTEM privileges.

“This is the one bug listed as under active attack for this month. It allows a local attacker to escalate privileges from sandboxed execution inside Chromium to kernel-level execution and full SYSTEM privileges.” reads the advisory published by ZDI.

Microsoft is aware of active exploitation of the flaw in the wild, but did not share details about the attacks.

The vulnerability was reported by malware researchers Jan Vojtěšek, Milánek, and Przemek Gmerek from Avast.

Another issue fixed by Microsoft is the CVE-2023-21549 (CVSS Score 8.8) flaw, which is listed as publicly known at the time of release. The issue is a Windows Workstation Service Elevation of Privilege vulnerability.

“To exploit this vulnerability, an attacker could execute a specially crafted malicious script which executes an RPC call to an RPC host. This could result in elevation of privilege on the server.” reads the advisory published by Microsoft. “An attacker who successfully exploited this vulnerability could execute RPC functions that are restricted to privileged accounts only.”

Here’s the full list of flaws addressed by Microsoft Patch Tuesday security updates for January 2023:

CVETitleSeverityCVSSPublicExploitedCVE-2023-21674Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege VulnerabilityImportant8.8NoYesCVE-2023-21549Windows Workstation Service Elevation of Privilege VulnerabilityImportant8.8YesNoCVE-2023-21561Microsoft Cryptographic Services Elevation of Privilege VulnerabilityCritical8.8NoNoCVE-2023-21551Microsoft Cryptographic Services Elevation of Privilege VulnerabilityCritical7.8NoNoCVE-2023-21743Microsoft SharePoint Server Security Feature Bypass VulnerabilityCritical8.2NoNoCVE-2023-21730Windows Cryptographic Services Remote Code Execution VulnerabilityCritical7.8NoNoCVE-2023-21543Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution VulnerabilityCritical8.1NoNoCVE-2023-21546Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution VulnerabilityCritical8.1NoNoCVE-2023-21555Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution VulnerabilityCritical8.1NoNoCVE-2023-21556Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution VulnerabilityCritical8.1NoNoCVE-2023-21679Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution VulnerabilityCritical8.1NoNoCVE-2023-21535Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution VulnerabilityCritical8.1NoNoCVE-2023-21548Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution VulnerabilityCritical8.1NoNoCVE-2023-21538.NET Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-217803D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217813D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217823D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217843D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217863D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217913D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217933D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217833D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217853D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217873D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217883D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217893D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217903D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-217923D Builder Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-21531Azure Service Fabric Container Elevation of Privilege VulnerabilityImportant7NoNoCVE-2023-21563BitLocker Security Feature Bypass VulnerabilityImportant6.8NoNoCVE-2023-21536Event Tracing for Windows Information Disclosure VulnerabilityImportant4.7NoNoCVE-2023-21753Event Tracing for Windows Information Disclosure VulnerabilityImportant5.5NoNoCVE-2023-21547Internet Key Exchange (IKE) Protocol Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21724Microsoft DWM Core Library Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21764Microsoft Exchange Server Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21763Microsoft Exchange Server Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21761Microsoft Exchange Server Information Disclosure VulnerabilityImportant7.5NoNoCVE-2023-21762Microsoft Exchange Server Spoofing VulnerabilityImportant8NoNoCVE-2023-21745Microsoft Exchange Server Spoofing VulnerabilityImportant8NoNoCVE-2023-21537Microsoft Message Queuing (MSMQ) Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21732Microsoft ODBC Driver Remote Code Execution VulnerabilityImportant8.8NoNoCVE-2023-21734Microsoft Office Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-21735Microsoft Office Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-21741Microsoft Office Visio Information Disclosure VulnerabilityImportant7.1NoNoCVE-2023-21736Microsoft Office Visio Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-21737Microsoft Office Visio Remote Code Execution VulnerabilityImportant7.8NoNoCVE-2023-21738Microsoft Office Visio Remote Code Execution VulnerabilityImportant7.1NoNoCVE-2023-21744Microsoft SharePoint Server Remote Code Execution VulnerabilityImportant8.8NoNoCVE-2023-21742Microsoft SharePoint Server Remote Code Execution VulnerabilityImportant8.8NoNoCVE-2023-21681Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityImportant8.8NoNoCVE-2023-21725Microsoft Windows Defender Elevation of Privilege VulnerabilityImportant6.3NoNoCVE-2023-21779Visual Studio Code Remote Code Execution VulnerabilityImportant7.3NoNoCVE-2023-21768Windows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21539Windows Authentication Remote Code Execution VulnerabilityImportant7.5NoNoCVE-2023-21752Windows Backup Service Elevation of Privilege VulnerabilityImportant7.1NoNoCVE-2023-21733Windows Bind Filter Driver Elevation of Privilege VulnerabilityImportant7NoNoCVE-2023-21739Windows Bluetooth Driver Elevation of Privilege VulnerabilityImportant7NoNoCVE-2023-21560Windows Boot Manager Security Feature Bypass VulnerabilityImportant6.6NoNoCVE-2023-21726Windows Credential Manager User Interface Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21540Windows Cryptographic Information Disclosure VulnerabilityImportant5.5NoNoCVE-2023-21550Windows Cryptographic Information Disclosure VulnerabilityImportant5.5NoNoCVE-2023-21559Windows Cryptographic Services Information Disclosure VulnerabilityImportant6.2NoNoCVE-2023-21525Windows Encrypting File System (EFS) Denial of Service VulnerabilityImportant5.9NoNoCVE-2023-21558Windows Error Reporting Service Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21552Windows GDI Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21532Windows GDI Elevation of Privilege VulnerabilityImportant7NoNoCVE-2023-21542Windows Installer Elevation of Privilege VulnerabilityImportant7NoNoCVE-2023-21683Windows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21677Windows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21758Windows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21527Windows iSCSI Service Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21755Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21754Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21747Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21748Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21749Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21772Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21773Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21774Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21675Windows Kernel Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21750Windows Kernel Elevation of Privilege VulnerabilityImportant7.1NoNoCVE-2023-21776Windows Kernel Information Disclosure VulnerabilityImportant5.5NoNoCVE-2023-21757Windows Layer 2 Tunneling Protocol (L2TP) Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21557Windows Lightweight Directory Access Protocol (LDAP) Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21676Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution VulnerabilityImportant8.8NoNoCVE-2023-21524Windows Local Security Authority (LSA) Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21771Windows Local Session Manager (LSM) Elevation of Privilege VulnerabilityImportant7NoNoCVE-2023-21728Windows Netlogon Denial of Service VulnerabilityImportant7.5NoNoCVE-2023-21746Windows NTLM Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21767Windows Overlay Filter Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21766Windows Overlay Filter Information Disclosure VulnerabilityImportant4.7NoNoCVE-2023-21682Windows Point-to-Point Protocol (PPP) Information Disclosure VulnerabilityImportant5.3NoNoCVE-2023-21760Windows Print Spooler Elevation of Privilege VulnerabilityImportant7.1NoNoCVE-2023-21765Windows Print Spooler Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21678Windows Print Spooler Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21759Windows Smart Card Resource Management Server Security Feature Bypass VulnerabilityImportant3.3NoNoCVE-2023-21541Windows Task Scheduler Elevation of Privilege VulnerabilityImportant7.8NoNoCVE-2023-21680Windows Win32k Elevation of Privilege VulnerabilityImportant7.8NoNoLookinFollow me on Twitter: @securityaffairs and Facebook and 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Pierluigi Paganini

(SecurityAffairs – hacking, Microsoft Patch Tuesday)

The post Microsoft Patch Tuesday for January 2023 fixed actively exploited zero-day appeared first on Security Affairs.