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Rewterz Threat Advisory – CVE-2023-20043 – Cisco CX Cloud Agent Vulnerability
January 17, 2023
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Rewterz Threat Alert – Bitter APT Threat Actors – Active IOCs
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Rewterz Threat Advisory – Multiple Microsoft Windows Secure Socket Tunneling Protocol (SSTP) Vulnerabilities

Severity

High

Analysis Summary

CVE-2023-21548 CVSS:8.1

Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Secure Socket Tunneling Protocol (SSTP). By sending a specially-crafted SSTP packet to an SSTP server, an attacker could exploit this vulnerability to execute arbitrary code on the server side.

CVE-2023-21535 CVSS:8.1

Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Secure Socket Tunneling Protocol (SSTP). By sending a specially-crafted request to a RAS server, an attacker could exploit this vulnerability to execute arbitrary code on the RAS server machine.

Impact

  • Code Execution

Indicators Of Compromise

CVE

  • CVE-2023-21548
  • CVE-2023-21535

Affected Vendors

Microsoft

Affected Products

  • Microsoft Windows 7 SP1 x32
  • Microsoft Windows 7 SP1 x64
  • Microsoft Windows Server 2012
  • Microsoft Windows 8.1 x32
  • Microsoft Windows 8.1 x64
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows RT 8.1
  • Microsoft Windows 10 x32
  • Microsoft Windows 10 x64
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2019
  • Microsoft Windows 10 1809 for x64-based Systems
  • Microsoft Windows 10 1809 for 32-bit Systems
  • Microsoft Windows 10 1809 for ARM64-based Systems
  • Microsoft Windows 10 1607 for 32-bit Systems
  • Microsoft Windows 10 1607 for x64-based Systems
  • Microsoft Windows 10 20H2 for 32-bit Systems
  • Microsoft Windows 10 20H2 for ARM64-based Systems
  • Microsoft Windows 10 20H2 for x64-based Systems
  • Microsoft Windows Server (Server Core installation) 2019
  • Microsoft Windows Server (Server Core installation) 2016
  • Microsoft Windows Server (Server Core installation) 2012 R2
  • Microsoft Windows Server (Server Core installation) 2012
  • Microsoft Windows Server for X64-based systems 2008 R2 SP1
  • Microsoft Windows Server for X64-based systems (Server Core installation) 2008 SP2
  • Microsoft Windows Server for 32-bit systems (Server Core installation) 2008 SP2
  • Microsoft Windows Server for 32-bit systems 2008 SP2
  • Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2 SP1
  • Microsoft Windows Server 2022Microsoft Windows Server (Server Core installation) 2022
  • Microsoft Windows Server for X64-based systems 2008 SP2
  • Microsoft Windows 10 21H2 for 32-bit Systems
  • Microsoft Windows 10 21H2 for ARM64-based Systems
  • Microsoft Windows 10 21H2 for x64-based Systems
  • Microsoft Windows 11 22H2 for ARM64-based Systems
  • Microsoft Windows 11 22H2 for x64-based Systems
  • Microsoft Windows 10 22H2 for 32-bit Systems
  • Microsoft Windows 10 22H2 for ARM64-based Systems
  • Microsoft Windows 10 22H2 for x64-based Systems
  • Microsoft Windows Server 2022 Datacenter: Azure Edition
  • Microsoft Windows 11 21H2 for ARM64-based Systems
  • Microsoft Windows 11 21H2 for x64-based Systems

Remediation

Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.

CVE-2023-21548

CVE-2023-21535