Detections
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PHTN-40-000105 - The Photon operating system must enable symlink access control protection in the kernel.
Information
By enabling the fs.protected_symlinks kernel parameter, symbolic links are permitted to be followed only when outside a sticky world-writable directory, or when the UID of the link and follower match, or when the directory owner matches the symlink's owner. Disallowing such symlinks helps mitigate vulnerabilities based on insecure file system accessed by privileged programs, avoiding an exploitation vector exploiting unsafe use of open() or creat().Solution
Navigate to and open:/etc/sysctl.d/zz-stig-hardening.conf
Add or update the following line:
fs.protected_symlinks = 1
At the command line, run the following command to load the new configuration:
# /sbin/sysctl --load /etc/sysctl.d/zz-stig-hardening.conf
Note: If the file zz-stig-hardening.conf does not exist, it must be created.
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_8-0_Y24M08_STIG.zip
Item Details
Category: ACCESS CONTROL
References: 800-53|AC-6(10), CAT|I, CCI|CCI-002235, Rule-ID|SV-258841r958726_rule, STIG-ID|PHTN-40-000105, Vuln-ID|V-258841
Plugin: Unix
Control ID: 1dd344876f1b44c64c962836eb4dd9ec5b59edde5f22a9f7a032bd15986640c8