TOSS 5 must restrict usage of ptrace to descendant processes.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-282509 | TOSS-05-000110 | SV-282509r1200507_rule | CCI-001082 | medium |
| Description | ||||
| Unrestricted usage of ptrace allows compromised binaries to run ptrace on other processes of the user. This way, 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 | |||
| Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide | 2026-04-01 | |||
Details
Check Text (C-282509r1200507_chk)
Verify TOSS 5 restricts usage of ptrace to descendant processes using the following command:
$ sudo sysctl kernel.yama.ptrace_scope
kernel.yama.ptrace_scope = 1
If the returned line does not have a value of "1", or a line is not returned, this is a finding.
Fix Text (F-86975r1200506_fix)
Configure TOSS 5 to restrict using ptrace to descendant processes by adding the following line to a file, in the "/etc/sysctl.d" directory:
kernel.yama.ptrace_scope = 1
The system configuration files must be reloaded for the changes to take effect. To reload the contents of the files, run the following command:
$ sudo sysctl --system