Red Hat Enterprise Linux 9 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must limit the number of bogus Internet Control Message Protocol (ICMP) response errors logs.
<VulnDiscussion>Some routers will send responses to broadcast frames that violate RFC-1122, which fills up a log file system with many useles...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must not send Internet Control Message Protocol (ICMP) redirects.
<VulnDiscussion>ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must not allow interfaces to perform Internet Control Message Protocol (ICMP) redirects by default.
<VulnDiscussion>ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must not enable IPv4 packet forwarding unless the system is a router.
<VulnDiscussion>Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this c...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must not accept router advertisements on all IPv6 interfaces.
<VulnDiscussion>An illicit router advertisement message could result in a man-in-the-middle attack.</VulnDiscussion><FalsePositives&...Rule Medium Severity
Node 2
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