fix(smb): stop truncating the NTLM domain on bare-username auth - #7
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_split_user_domain fell back to default_domain.split(".")[0] (e.g.
"sccm.lab" -> "sccm") when the operator supplies a bare username with
no DOMAIN\ or user@domain prefix. A DC accepts the truncated form
because it is self-authoritative, but a member server's Netlogon
pass-through can reject it -- confirmed against a live lab where the
same credentials succeeded via netexec (full DNS domain) and failed
via this client (truncated domain) against every non-DC host.
Delegate to the shared split_user_domain (openhound_collector_common,
already used by wmi.py) instead of the private duplicate, which does
not truncate. Also stops truncating the domain on the null-session
fallback for consistency.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
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Found while validating this collector's SCCM Hierarchy TAKEOVER-1 detection against a GOAD
SCCM lab, as a domain user. I'm a bad user and did not read the doc:
-uneedsdomain\usernameand I just supplied the username, like many other tools allow.
The bare-username case is still an explicit, reachable fallback in
_split_user_domain, not arejected input. It fell back to
default_domain.split(".")[0](e.g. "sccm.lab" -> "sccm"),assuming a domain's NetBIOS name is always its DNS domain's first label. That assumption can be
wrong, and is wrong in this lab: its real NetBIOS name is
SCCMLAB.http_auth.pyhas documented, since this repo's first commit, that smb_sso.py importssplit_user_domainfrom there -- it never did;_split_user_domainwas a separate, buggyduplicate moved verbatim from collectors/registry.py instead.
Delegates to the shared
split_user_domain(openhound_collector_common, already used bywmi.py).