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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
Based on SOC occupation classification
Showing SKILL.md
| name | cis-ubuntu1804-v220-3-3-6 |
| description | Ensure secure ICMP redirects are not accepted |
| category | cis-networking |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","networking","kernel-parameter"] |
| cis_id | 3.3.6 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Secure ICMP redirects are the same as ICMP redirects, except they come from gateways listed in the default gateway list. It is assumed that these gateways are known to be legitimate, so the risk is lower. However, it is still possible for even known gateways to be compromised.
It is still possible for even known gateways to be compromised. Setting net.ipv4.conf.all.secure_redirects to 0 protects the system from routing table updates by possibly compromised known gateways.
None.
Run the following commands to verify secure ICMP redirects are not accepted:
sysctl net.ipv4.conf.all.secure_redirects
sysctl net.ipv4.conf.default.secure_redirects
grep -E '^\s*net\.ipv4\.conf\.(all|default)\.secure_redirects\s*=\s*0\b' /etc/sysctl.conf /etc/sysctl.d/*.conf
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
Set the following parameters in /etc/sysctl.conf or a /etc/sysctl.d/* file:
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
Run the following commands to set the active kernel parameters:
sysctl -w net.ipv4.conf.all.secure_redirects=0
sysctl -w net.ipv4.conf.default.secure_redirects=0
sysctl -w net.ipv4.route.flush=1
net.ipv4.conf.all.secure_redirects = 1, net.ipv4.conf.default.secure_redirects = 1
Version 8
4.1 Establish and Maintain a Secure Configuration Process - Establish and maintain a secure configuration process for enterprise assets.
Version 7
5.1 Establish Secure Configurations - Maintain documented, standard security configuration standards for all authorized operating systems and software.
Automated