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CVE-2019-1019 is a security feature bypass in the NTLM/NETLOGON authentication flow that can enable man-in-the-middle relay attacks. The flaw arises from improper validation during network authentication: the computer name expected in the NTLM_AUTHENTICATE message can be omitted, preventing proper target computer-name validation during Netlogon pass-through authentication. In affected implementations, a specially crafted authentication request can cause a NETLOGON message to obtain the session key and permit message signing despite the authentication context having been relayed. The issue affects the integrity protections intended to bind NTLM authentication to the correct target and was addressed by changing how NTLM validates network authentication messages.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository implements the PrintSpoofer exploit as a Reflective DLL in C++. The exploit targets a vulnerability in the Windows Print Spooler service (CVE-2019-1040 / CVE-2019-1019) that allows a local attacker with SE_IMPERSONATE_NAME privilege to escalate to SYSTEM. The main exploit logic is in 'dllmain.cpp' and 'PrintSpoofer.cpp', which create a named pipe, trigger the Print Spooler to connect via RPC, and impersonate the SYSTEM token. Upon success, the exploit executes a specified binary as SYSTEM. The repository includes full source code, IDL definitions for the MS-RPRN protocol, and a Reflective DLL loader for in-memory execution. No network endpoints are targeted; the attack vector is local privilege escalation via named pipes and RPC. The code is operational and suitable for use in penetration testing frameworks such as Cobalt Strike.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Security feature bypass involving the Netlogon session key in the NTLM/Netlogon authentication chain.
NTLM_AUTHENTICATE内のコンピュータ名データを欠損させることで検証を回避し、NTLMリレー/中間者攻撃を可能にする脆弱性。MIC整合性チェックも回避可能と説明されている。
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.