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Assessment Title
Rule Text
TOSS 5 must enable kernel parameters to enforce discretionary access control on hardlinks.
Description
Discussion Text
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 insecure file system accessed by privileged programs, avoiding an exploitation vector exploiting unsafe use of open() or creat().
Satisfies: SRG-OS-000312-GPOS-00123, SRG-OS-000324-GPOS-00125
Satisfies: SRG-OS-000312-GPOS-00123, SRG-OS-000324-GPOS-00125
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