1.5.3 Ensure address space layout randomization (ASLR) is enabled - sysctl

Information

Address space layout randomization (ASLR) is an exploit mitigation technique which randomly arranges the address space of key data areas of a process.

Rationale:

Randomly placing virtual memory regions will make it difficult to write memory page exploits as the memory placement will be consistently shifting.

Solution

Set the following parameter in /etc/sysctl.conf or a /etc/sysctl.d/* file:
Example:

# printf '
kernel.randomize_va_space = 2
' >> /etc/sysctl.d/60-kernel_sysctl.conf

Run the following command to set the active kernel parameter:

# sysctl -w kernel.randomize_va_space=2

See Also

https://workbench.cisecurity.org/files/3807

Item Details

Category: SYSTEM AND INFORMATION INTEGRITY

References: 800-53|SI-16, CSCv7|8.3

Plugin: Unix

Control ID: 22433a3e0f239d1e07bcd80dc77bbdcba926e50b0dc4c5f45ad2f65e5c52313a