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XCCDF
Red Hat Enterprise Linux 9 Security Technical Implementation Guide
SRG-OS-000312-GPOS-00123
SRG-OS-000312-GPOS-00123
An XCCDF Group - A logical subset of the XCCDF Benchmark
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SRG-OS-000312-GPOS-00123
1 Rule
<GroupDescription></GroupDescription>
RHEL 9 must enable kernel parameters to enforce discretionary access control on symlinks.
Medium Severity
<VulnDiscussion>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 user identifier (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(). Satisfies: SRG-OS-000312-GPOS-00123, SRG-OS-000324-GPOS-00125</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>