CVE-2021-34500HighCVSS 6.3

Windows Kernel Memory Information Disclosure Vulnerability

Published
July 13, 2021
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2021-34500 →

📋 Description

What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is Guest VM to Hyper-V host server - virtualization security boundary.

What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is memory from the file cache. This could include unintentional read access to memory contents in kernel space from a user mode process, and on a Hyper-V server this could result in Guest VM to Hyper-V host server memory content disclosure.

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to win a race condition.

🎯 Affected products39

  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1909 for 32-bit Systems
  • Windows 10 Version 1909 for ARM64-based Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 2004 for 32-bit Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for x64-based Systems
  • Windows 10 Version 20H2 for 32-bit Systems
  • Windows 10 Version 20H2 for ARM64-based Systems
  • Windows 10 Version 21H1 for 32-bit Systems
  • Windows 10 Version 21H1 for ARM64-based Systems
  • Windows 10 Version 21H1 for x64-based Systems
  • Windows 10 for 32-bit Systems
  • Windows 10 for x64-based Systems
  • Windows 7 for 32-bit Systems Service Pack 1
  • Windows 7 for x64-based Systems Service Pack 1
  • Windows 8.1 for 32-bit systems
  • Windows 8.1 for x64-based systems
  • Windows RT 8.1
  • 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
  • +9 more not shown

✅ Remediation

KB5004244 (Security Update) — fixed build 10.0.17763.2061 KB5004245 (Security Update) — fixed build 10.0.18363.1679 KB5004237 (Security Update) — fixed build 10.0.19043.1110 KB5004237 (Security Update) — fixed build 10.0.19041.1110 KB5004237 (Security Update) — fixed build 10.0.19042.1110 KB5010358 (Security Update) — fixed build 10.0.10240.19204 KB5010359 (Security Update) — fixed build 10.0.14393.4946 KB5010404 (Monthly Rollup) — fixed build 6.1.7601.25860 KB5010422 (Security Only) — fixed build 6.1.7601.25860 KB5010419 (Monthly Rollup) — fixed build 6.3.9600.20269 KB5010395 (Security Only) — fixed build 6.3.9600.20269 KB5010384 (Monthly Rollup) — fixed build 6.0.6003.21374 KB5010403 (Security Only) — fixed build 6.0.6003.21372 KB5010392 (Monthly Rollup) — fixed build 6.2.9200.23605 KB5010412 (Security Only) — fixed build 6.2.9200.23605

🔗 References (27)