TMA-LNX-KERN-SUID-DUMPABLE
Ensure setuid programs cannot dump core
MediumLevel 1Automatedlinux
Description
Kernel parameter fs.suid_dumpable should be 0.
How it is checked
Audit method: Shell command
shell
sysctl -n fs.suid_dumpable- Expected output
0
How it is fixed
Fix method: Shell command
shell
sysctl -w fs.suid_dumpable=0 && printf 'fs.suid_dumpable = 0\n' > /etc/sysctl.d/60-tmaegis-fs_suid_dumpable.confProperties
- Operating systems
- ubuntu-22.04, ubuntu-24.04, rocky-9
- Tags
- kernelsysctlnetwork
- Reference
- CIS Linux Benchmark - Network Configuration / Kernel Parameters (verify section number for your distro release)
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
shell
tmaegis scan --target linux