From Canonical Ubuntu 16.04 Security Technical Implementation Guide
Part of SRG-OS-000433-GPOS-00193
Associated with: CCI-002824
Some adversaries launch attacks with the intent of executing code in non-executable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address space layout randomization. Data execution prevention safeguards can either be hardware-enforced or software-enforced with hardware providing the greater strength of mechanism.
Verify the Ubuntu operating system implements address space layout randomization (ASLR). Check that ASLR is configured on the system with the following command: # sudo sysctl kernel.randomize_va_space kernel.randomize_va_space = 2 If nothing is returned; we must verify the kernel parameter "randomize_va_space" is set to "2" with the following command: # kernel.randomize_va_space" /etc/sysctl.conf /etc/sysctl.d/* kernel.randomize_va_space = 2 If "kernel.randomize_va_space" is not set to "2", this is a finding.
Configure the operating system implement virtual address space randomization. Set the system to the required kernel parameter by adding the following line to "/etc/sysctl.conf" (or modify the line to have the required value): kernel.randomize_va_space=2
Lavender hyperlinks in small type off to the right (of CSS
class id, if you view the page source) point to
globally unique URIs for each document and item. Copy the
link location and paste anywhere you need to talk
unambiguously about these things.
You can obtain data about documents and items in other
formats. Simply provide an HTTP header Accept:
text/turtle or
Accept: application/rdf+xml.
Powered by sagemincer