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Affichage de SKILL.md
macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
Windows userland post-exploitation for credential harvesting, monitoring, AMSI/ETW bypass, and stealth operations
Kubernetes post-exploitation for container escape, secret extraction, RBAC abuse, and cluster persistence
Basé sur la classification professionnelle SOC
| name | cis-ubuntu1804-v220-6-1-5 |
| description | Ensure permissions on /etc/shadow are configured |
| category | cis-iam |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","file-permissions"] |
| cis_id | 6.1.5 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
The /etc/shadow file is used to store the information about user accounts that is critical to the security of those accounts, such as the hashed password and other security information.
If attackers can gain read access to the /etc/shadow file, they can easily run a password cracking program against the hashed password to break it. Other security information that is stored in the /etc/shadow file (such as expiration) could also be useful to subvert the user accounts.
Run the following command to verify /etc/shadow is mode 640 or more restrictive, Uid is 0/root and Gid is 0/root or {GID}/shadow:
# stat -Lc 'Access: (%#a/%A) Uid: ( %u/ %U) Gid: ( %g/ %G)' /etc/shadow
Access: (0640/-rw-r-----) Uid: ( 0/ root) Gid: ( 42/ shadow)
Run one of the following commands to set ownership of /etc/shadow to root and group to either root or shadow:
# chown root:shadow /etc/shadow
-OR-
# chown root:root /etc/shadow
Run the following command to remove excess permissions from /etc/shadow:
# chmod u-x,g-wx,o-rwx /etc/shadow
Access: (0640/-rw-r-----) Uid: ( 0/ root) Gid: ( 42/ shadow)