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XCCDF
CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide
SRG-OS-000324-GPOS-00125
SRG-OS-000324-GPOS-00125
An XCCDF Group - A logical subset of the XCCDF Benchmark
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SRG-OS-000324-GPOS-00125
1 Rule
AlmaLinux OS 9 must enable kernel parameters to enforce discretionary access control on hardlinks.
Medium Severity
By enabling the fs.protected_hardlinks kernel parameter, users can no longer create soft or hard links to files they do not own. Disallowing such hardlinks mitigates vulnerabilities based on unsecure file systems accessed by privileged programs, avoiding an exploitation vector exploiting unsafe use of open() or creat().