CVE Vulnerabilities

CVE-2019-1317

Improper Link Resolution Before File Access ('Link Following')

Published: Oct 10, 2019 | Modified: Oct 11, 2019
CVSS 3.x
7.3
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
CVSS 2.x
5.6 MEDIUM
AV:L/AC:L/Au:N/C:N/I:P/A:C
RedHat/V2
RedHat/V3
Ubuntu

A denial of service vulnerability exists when Windows improperly handles hard links, aka Microsoft Windows Denial of Service Vulnerability.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Name Vendor Start Version End Version
Windows_10 Microsoft - (including) - (including)
Windows_10 Microsoft 1607 (including) 1607 (including)
Windows_10 Microsoft 1703 (including) 1703 (including)
Windows_10 Microsoft 1709 (including) 1709 (including)
Windows_10 Microsoft 1803 (including) 1803 (including)
Windows_10 Microsoft 1809 (including) 1809 (including)
Windows_10 Microsoft 1903 (including) 1903 (including)
Windows_server_2016 Microsoft - (including) - (including)
Windows_server_2016 Microsoft 1803 (including) 1803 (including)
Windows_server_2016 Microsoft 1903 (including) 1903 (including)
Windows_server_2019 Microsoft - (including) - (including)

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References