CVE-2022-33679HighCVSS 8.1

Windows Kerberos Elevation of Privilege Vulnerability

Published
September 13, 2022
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2022-33679 →

📋 Description

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? The attacker must inject themselves into the logical network path between the target and the resource requested by the victim to read or modify network communications. This is called a machine-in-the-middle (MITM) attack.

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

How could an attacker exploit this vulnerability? An unauthenticated attacker could perform a man-in-the-middle network exploit to downgrade a client's encryption to the RC4-md4 cypher, followed by cracking the user's cypher key. The attacker could then compromise the user's Kerberos session key to elevate privileges.

Are default configurations of Kerberos impacted by this vulnerability? No. For this vulnerability to be exploitable, the victim user must have the Do not require Kerberos preauthentication option enabled and must have a configured RC4 key. This option is not enabled by default.

🎯 Affected products16

  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)

✅ Remediation

KB5017315 (Security Update) — fixed build 10.0.17763.3406 KB5017316 (Security Update) — fixed build 10.0.20348.1006 KB5017392 (Security Hotpatch Update) — fixed build 10.0.20348.916 KB5017305 (Security Update) — fixed build 10.0.14393.5356 KB5017358 (Monthly Rollup) — fixed build 6.0.6003.21666 KB5017371 (Security Only) — fixed build 6.0.6003.21666 KB5017361 (Monthly Rollup) — fixed build 6.1.7601.26115 KB5017373 (Security Only) — fixed build 6.1.7601.26115 KB5017370 (Monthly Rollup) — fixed build 6.2.9200.23865 KB5017377 (Security Only) — fixed build 6.2.9200.23865 KB5017367 (Monthly Rollup) — fixed build 6.3.9600.20571 KB5017365 (Security Only) — fixed build 6.3.9600.20571

🔗 References (24)