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CVE-2018-8476: Microsoft Windows Server 2008: Remote code execution

CVE-2018-8476 is rated critical with a CVSS v3.0 base score of 9.8 and affects Microsoft Windows Server 2008. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

A remote code execution vulnerability exists in the way that Windows Deployment Services TFTP Server handles objects in memory, aka "Windows Deployment Services TFTP Server Remote Code Execution Vulnerability." This affects Windows Server 2012 R2, Windows Server 2008, Windows Server 2012, Windows Server 2019, Windows Server 2016, Windows Server 2008 R2, Windows 10 Servers.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.

Affected products

  • Microsoft Windows Server 2008: all versions listed by NVD; r2 sp1
  • Microsoft Windows Server 2012: all versions listed by NVD; r2
  • Microsoft Windows Server 2016: all versions listed by NVD; 1803
  • Microsoft Windows Server 2019: all versions listed by NVD

References