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Guide to the Secure Configuration of SUSE Linux Enterprise Micro 5

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Secure Session Configuration Files for Login Accounts

    When a user logs into a Unix account, the system configures the user's session by reading a number of files. Many of these files are located in the user's home directory, and may have weak permissi...
    Group
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  • Maximum login attempts delay

    Maximum time in seconds between fail login attempts before re-prompting.
    Value
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  • Ensure the Logon Failure Delay is Set Correctly in login.defs

    To ensure the logon failure delay controlled by <code>/etc/login.defs</code> is set properly, add or correct the <code>FAIL_DELAY</code> setting in <code>/etc/login.defs</code> to read as follows: ...
    Rule Medium Severity
    Show

  • SELinux

    SELinux is a feature of the Linux kernel which can be used to guard against misconfigured or compromised programs. SELinux enforces the idea that programs should be limited in what files they can a...
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  • SELinux policy

    Type of policy in use. Possible values are:
    targeted - Only targeted network daemons are protected.
    strict - Full SELinux protection.
    mls - Multiple levels of security
    Value
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  • Disable Kernel Parameter for IPv6 Forwarding

    To set the runtime status of the <code>net.ipv6.conf.all.forwarding</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.all.forwarding=0</pre> To make sure that ...
    Rule Medium Severity
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  • Disable Kernel Parameter for Accepting ICMP Redirects by Default on IPv6 Interfaces

    To set the runtime status of the <code>net.ipv6.conf.default.accept_redirects</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.default.accept_redirects=0</pre...
    Rule Medium Severity
    Show

  • Disable Kernel Parameter for Accepting Source-Routed Packets on IPv6 Interfaces by Default

    To set the runtime status of the <code>net.ipv6.conf.default.accept_source_route</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.default.accept_source_route=...
    Rule Medium Severity
    Show

  • Disable Kernel Parameter for IPv6 Forwarding by default

    To set the runtime status of the <code>net.ipv6.conf.default.forwarding</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv6.conf.default.forwarding=0</pre> To make su...
    Rule Medium Severity
    Show

  • Kernel Parameters Which Affect Networking

    The sysctl utility is used to set parameters which affect the operation of the Linux kernel. Kernel parameters which affect networking and have security implications are described here.
    Group
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  • Network Related Kernel Runtime Parameters for Hosts and Routers

    Certain kernel parameters should be set for systems which are acting as either hosts or routers to improve the system's ability defend against certain types of IPv4 protocol attacks.
    Group
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  • net.ipv4.conf.all.accept_redirects

    Disable ICMP Redirect Acceptance
    Value
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  • net.ipv4.conf.all.accept_source_route

    Trackers could be using source-routed packets to generate traffic that seems to be intra-net, but actually was created outside and has been redirected.
    Value
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  • net.ipv4.conf.default.accept_redirects

    Disable ICMP Redirect Acceptance?
    Value
    Show

  • net.ipv4.conf.default.accept_source_route

    Disable IP source routing?
    Value
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  • net.ipv4.tcp_syncookies

    Enable to turn on TCP SYN Cookie Protection
    Value
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  • Disable Accepting ICMP Redirects for All IPv4 Interfaces

    To set the runtime status of the <code>net.ipv4.conf.all.accept_redirects</code> kernel parameter, run the following command: <pre>$ sudo sysctl -w net.ipv4.conf.all.accept_redirects=0</pre> To mak...
    Rule Medium Severity
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  • Verify '/proc/sys/crypto/fips_enabled' exists

    On a system where FIPS 140-2 mode is enabled, <code>/proc/sys/crypto/fips_enabled</code> must exist. To verify FIPS mode, run the following command: <pre>cat /proc/sys/crypto/fips_enabled</pre> ...
    Rule High Severity
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  • Ensure Users Re-Authenticate for Privilege Escalation - sudo !authenticate

    The sudo <code>!authenticate</code> option, when specified, allows a user to execute commands using sudo without having to authenticate. This should be disabled by making sure that the <code>!authe...
    Rule Medium Severity
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  • Sudo

    <code>Sudo</code>, which stands for "su 'do'", provides the ability to delegate authority to certain users, groups of users, or system administrators. When configured for system users and/or groups...
    Group
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