AlmaLinux OS 9 must restrict usage of ptrace to descendant processes.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269424 | ALMA-09-040940 | SV-269424r1117266_rule | CCI-001082 | medium |
| Description | ||||
| Unrestricted usage of ptrace allows compromised binaries to run ptrace on other processes of the user. Like this, the attacker can steal sensitive information from the target processes (e.g. SSH sessions, web browser etc.) without any additional assistance from the user (i.e. without resorting to phishing). | ||||
| STIG | Date | |||
| Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide | 2026-02-27 | |||
Related Frameworks
3 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
SC-2
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.13.3
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-001082
1.00
- DISA · V1R6 · disa_xccdf · related
Details
Check Text (C-269424r1117266_chk)
Verify AlmaLinux OS 9 restricts usage of ptrace to descendant processes (1), admins only (2), or disables ptrace entirely (3) with the following command:
$ sysctl kernel.yama.ptrace_scope
kernel.yama.ptrace_scope = 1
If the returned line has a value of "0" or a line is not returned, this is a finding.
Check that the configuration files are present to enable this kernel parameter.
$ /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep -F kernel.yama.ptrace_scope | tail -1
kernel.yama.ptrace_scope = 1
If "kernel.yama.ptrace_scope" is equal to "0" or nothing is returned, this is a finding.
Fix Text (F-73356r1049683_fix)
Configure AlmaLinux OS 9 to restrict usage of ptrace to with the following command:
$ echo "kernel.yama.ptrace_scope = 1" > /etc/sysctl.d/60-ptrace.conf
Load settings from all system configuration files with the following command:
$ sysctl --system