# CVE-2017-0004: Local Security Authority Subsystem Service Denial of Service Vulnerability

CVE-2017-0004 is fixed in 12 products on 1 platform, first by KB3212646, released January 10, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-0004
- Priority: Routine
- CVSS: 6.5 (Important)
- EPSS: 0.8921
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: yes
- Published: Jan 10, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-0004

## Description

<p>This security update corrects a denial of service in the Local Security Authority Subsystem Service (LSASS) caused when an unauthenticated attacker sends a specially crafted authentication request. A remote attacker who successfully exploited this vulnerability could cause a denial of service on the target system's LSASS service, which triggers an automatic reboot of the system.</p> <p>The security update addresses the vulnerability by changing the way that LSASS handles specially crafted authentication requests.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB3212646](https://patchblox.com/security/data/fix/microsoft/kb3212646.md) | Jan 10, 2017 |
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB3212642](https://patchblox.com/security/data/fix/microsoft/kb3212642.md) | Jan 10, 2017 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB3212646](https://patchblox.com/security/data/fix/microsoft/kb3212646.md) | Jan 10, 2017 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB3212642](https://patchblox.com/security/data/fix/microsoft/kb3212642.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 |  | [KB3212646](https://patchblox.com/security/data/fix/microsoft/kb3212646.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 |  | [KB3212642](https://patchblox.com/security/data/fix/microsoft/kb3212642.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB3212646](https://patchblox.com/security/data/fix/microsoft/kb3212646.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB3212642](https://patchblox.com/security/data/fix/microsoft/kb3212642.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB3212646](https://patchblox.com/security/data/fix/microsoft/kb3212646.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB3212642](https://patchblox.com/security/data/fix/microsoft/kb3212642.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB3216775](https://patchblox.com/security/data/fix/microsoft/kb3216775.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB3216775](https://patchblox.com/security/data/fix/microsoft/kb3216775.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 |  | [KB3216775](https://patchblox.com/security/data/fix/microsoft/kb3216775.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB3216775](https://patchblox.com/security/data/fix/microsoft/kb3216775.md) | Jan 10, 2017 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB3216775](https://patchblox.com/security/data/fix/microsoft/kb3216775.md) | Jan 10, 2017 |
| Microsoft | Windows Vista Service Pack 2 |  | [KB3216775](https://patchblox.com/security/data/fix/microsoft/kb3216775.md) | Jan 10, 2017 |
| Microsoft | Windows Vista x64 Edition Service Pack 2 |  | [KB3216775](https://patchblox.com/security/data/fix/microsoft/kb3216775.md) | Jan 10, 2017 |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo