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1.5.6 Ensure the operating system is not configured to acquire save or process core dumps

Information

The operating system must disable acquiring, saving, and processing core dumps.

It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors.

A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could contain sensitive data and is generally useful only for developers trying to debug problems.

When the kernel invokes systemd-coredumpt to handle a core dump, it runs in privileged mode, and will connect to the socket created by the systemd-coredump.socket unit. This, in turn, will spawn an unprivileged [email protected] instance to process the core dump.

Solution

Configure the system to disable "systemd-coredump.socket" with the following command:

# systemctl disable --now systemd-coredump.socket # systemctl mask systemd-coredump.socket

Created symlink /etc/systemd/system/systemd-coredump.socket -> /dev/null

Reload the daemon for this change to take effect.

# systemctl daemon-reload

See Also

https://workbench.cisecurity.org/benchmarks/19886

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, Rule-ID|SV-230312r833308_rule, Vuln-ID|V-230312

Plugin: Unix

Control ID: 4ebc187bbe671ec57b0ce6e2476bd730fe7e850d79a9cf9a02d399b71e2964f8