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Rewterz Threat Advisory – Multiple Windows Cryptographic Vulnerabilities

Severity

Medium

Analysis Summary

CVE-2023-21559 CVSS:5.5

Microsoft Windows could allow a local authenticated attacker to obtain sensitive information, caused by a flaw in the Cryptographic component. By executing a specially-crafted program, an attacker could exploit this vulnerability to obtain Windows cryptographic secrets and then use this information to launch further attacks against the affected system.

CVE-2023-21561 CVSS:8.8

Microsoft Windows could allow a local authenticated attacker to gain elevated privileges on the system, caused by a flaw in the Cryptographic Services component. By executing a specially-crafted program, an authenticated attacker could exploit this vulnerability to execute arbitrary code with higher privileges.

CVE-2023-21550 CVSS:5.5

Microsoft Windows could allow a local authenticated attacker to obtain sensitive information, caused by a flaw in the Cryptographic component. By executing a specially-crafted program, an attacker could exploit this vulnerability to obtain Windows cryptographic secrets and then use this information to launch further attacks against the affected system.

CVE-2023-21540 CVSS:5.5

Microsoft Windows could allow a local authenticated attacker to obtain sensitive information, caused by a flaw in the Cryptographic component. By executing a specially-crafted program, an attacker could exploit this vulnerability to obtain Windows cryptographic secrets and then use this information to launch further attacks against the affected system.

CVE-2023-21551 CVSS:7.8

Microsoft Windows could allow a local authenticated attacker to gain elevated privileges on the system, caused by a flaw in the Cryptographic Services component. By executing a specially-crafted program, an authenticated attacker could exploit this vulnerability to obtain SYSTEM privileges.

CVE-2023-21730 CVSS:7.8

Microsoft Windows could allow a local authenticated attacker to to gain elevated privileges on the system, caused by a flaw in the Cryptographic Services. By sending a specially-crafted request, an attacker could exploit this vulnerability to gain elevated privileges.

Impact

  • Information Disclosure
  • Privilege Escalation

Indicators Of Compromise

CVE

  • CVE-2023-21559
  • CVE-2023-21561
  • CVE-2023-21550
  • CVE-2023-21540
  • CVE-2023-21551
  • CVE-2023-21730

Affected Vendors

Microsoft

Affected Products

  • 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 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 2022
  • Microsoft Windows Server (Server Core installation) 2022
  • 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 11 21H2 for ARM64-based Systems
  • Microsoft Windows 11 21H2 for x64-based Systems
  • Microsoft Windows Server 2022 Datacenter: Azure Edition

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-2023-21559

CVE-2023-21561

CVE-2023-21550

CVE-2023-21540

CVE-2023-21551

CVE-2023-21730