Root command and argument injection
P-01, P-06, P-07, P-25 and P-41 remove unsafe shell boundaries, validate privileged arguments and constrain identity transitions.
Verified CSF/LFD hardening
How DCSF hardens CSF/LFD against real exploit classes
DH20.01 closes 51 verified security issues across root execution, log parsing, remote inputs, filesystem races, web panels, clustering, process identity, DNS and firewall recovery.
DCSF
Nine exploit classes addressed in DH20.01
Each class is linked to public P-numbered remediations, negative tests and regression evidence in the signed release.
ReDoS and parser resource exhaustion
P-09, P-19, P-33, P-43 and P-49 bound line length, allocation, regex work, output, concurrency and procfs scanning.
Symlink, hardlink and TOCTOU races
P-03, P-22, P-32 and P-34 bind sensitive work to verified files, owners and inodes instead of reusable paths.
Update and remote-source substitution
P-02, P-05, P-15, P-16, P-18, P-40 and P-42 authenticate releases, constrain archives and retain a last-known-good state.
XSS, CSRF, MIME and panel-authorisation abuse
P-10, P-11, P-31, P-36, P-38 and P-51 protect rendering, state changes, templates, webroots and native panel permissions.
Cluster spoofing, replay and resource abuse
P-20 authenticates and frames cluster traffic, detects replay and applies strict connection, message and work limits.
Process identity and accounting bypass
P-44 through P-50 defend against PID reuse, procfs field shifting, PGID/SID confusion, pignore abuse and unsafe lock recovery.
Firewall state loss and policy bypass
P-17, P-35, O-02 and O-03 make rule changes transactional and preserve reply traffic, rollback state and Docker-owned policy.
DNS trust-boundary and cache confusion
P-27 through P-30 separate display data from authorisation, canonicalise PTR values and bound resolver work and caches.
DCSF
Security architecture layers
The fixes combine into a coherent model for release integrity, untrusted input, privilege boundaries and active firewall state.
Signed distribution
Pinned RSA-3072 trust, SHA-256-signed manifests, strict HTTPS and explicit rollback checks protect the release path.
Bounded log parsing
Length, record and work limits prevent untrusted log input from consuming unbounded parser resources.
Privilege boundaries
Sensitive operations use validated arguments, controlled environments and checked identity transitions.
Remote input validation
Blocklists, archives and templates are accepted only through canonical URLs and verified transport.
Filesystem race resistance
No-follow handling, ownership checks and inode binding reduce symlink, hardlink and replacement races.
Transactional firewall state
Candidate rules are validated before activation, with controlled recovery if application fails.
Authenticated clustering
Cluster messages are authenticated, replay-aware, framed and subject to strict resource limits.
DNS trust and caching
Resolver responses are bounded, validated and cached without turning stale data into silent trust.
DCSF
Evidence, not declarations
Each remediation is paired with negative tests, regression coverage and checks on supported operating-system families.
Threat model
Identify the input, trust boundary and failure consequence.
Attack test
Reproduce abuse in a controlled environment.
Remediation
Apply the smallest change that removes the vulnerability class.
Regression
Automate the evidence that prevents recurrence.
DCSF
Email the DCSF teamReport a suggestion or technical problem
Send DCSF suggestions, compatibility reports and reproducible technical problems to dat@etop.pl.
DCSF
Questions operators ask
Key information about the first production release.
Is DCSF the latest hardened CSF/LFD release from DataHouse?
Yes. DH20.01 is the latest and most hardened release in the DCSF line. It maps to signed technical package 15.10.4 and includes 51 verified security fixes plus three operational controls.
Which control panels does DCSF support?
DCSF supports cPanel & WHM, DirectAdmin, CyberPanel, CWP, InterWorx, VestaCP and Webmin, plus a generic mode for supported RHEL- and Debian-family Linux servers.
What bugs and exploit classes were fixed?
The public register covers command and argument injection, ReDoS and resource exhaustion, file races, update-chain substitution, web-panel abuse, cluster spoofing and replay, process identity bypasses, DNS trust errors and firewall-state loss.
Can I download DCSF today?
Yes. DH20.01 is public and maps to the signed DCSF 15.10.4 package. The bootstrap verifies every trust-bearing artifact before installation.