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Mallory
Critical

Remote Code Execution in Microsoft Remote Desktop Services (DejaBlue)

IdentifiersCVE-2019-1182CWE-787

CVE-2019-1182 is a pre-authentication remote code execution vulnerability in Microsoft Remote Desktop Services (formerly Terminal Services). An unauthenticated attacker can exploit the flaw by connecting to the target over RDP and sending specially crafted connection requests to the Remote Desktop Service. Successful exploitation allows arbitrary code execution on the target system. The provided content states Microsoft addressed the issue by correcting how Remote Desktop Services handles connection requests. The vulnerability is commonly discussed as part of the 2019 'DejaBlue' set of RDP flaws.

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For your environment

Are you exposed to this one?

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows unauthenticated remote execution of arbitrary code on the affected system. An attacker could install programs, view, modify, or delete data, and create new accounts with full user rights. Given the pre-authentication, network-reachable nature of the flaw, exposed RDP services are at risk of full system compromise.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure of RDP services. The supporting content recommends disabling RDP where not required, enabling Network Level Authentication (NLA) on supported systems, blocking TCP/3389 at perimeter firewalls, and restricting RDP access with host-based firewall rules to trusted administrator IP addresses. Note that perimeter blocking does not mitigate attacks originating from inside the network, and NLA changes the attack preconditions rather than replacing patching.

Remediation

Patch, then assume compromise.

Apply Microsoft's security update for CVE-2019-1182. The provided content indicates the fix corrects how Remote Desktop Services handles RDP connection requests. Organizations should deploy the relevant Microsoft patches to all affected Windows systems.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationRemote Desktopapplication
Microsoft CorporationWindows 10operating_system
Microsoft CorporationWindows 10 1507operating_system
Microsoft CorporationWindows 10 1607operating_system
Microsoft CorporationWindows 10 1803operating_system
Microsoft CorporationWindows 10 1809operating_system
Microsoft CorporationWindows 7operating_system
Microsoft CorporationWindows 8.1operating_system
Microsoft CorporationWindows Rt 8.1operating_system
Microsoft CorporationWindows Server 1803operating_system
Microsoft CorporationWindows Server 1903operating_system
Microsoft CorporationWindows Server 2008operating_system
Microsoft CorporationWindows Server 2012operating_system
Microsoft CorporationWindows Server 2012 R2operating_system
Microsoft CorporationWindows Server 2016operating_system
Microsoft CorporationWindows Server 2019operating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.