# CVE-2020-1578: Windows Kernel Information Disclosure Vulnerability

CVE-2020-1578 is fixed in 20 products on 1 platform, first by KB4571709, released August 11, 2020. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2020-1578
- Priority: Urgent
- CVSS: 5.5 (Important)
- EPSS: 0.0094
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Aug 11, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1578

## Description

<p>An information disclosure vulnerability exists in the Windows kernel that could allow an attacker to retrieve information that could lead to a <a href="https://technet.microsoft.com/en-us/library/security/dn848375.aspx#ASLR">Kernel Address Space Layout Randomization (ASLR)</a> bypass. An attacker who successfully exploited the vulnerability could retrieve the memory address of a kernel object.</p> <p>To exploit the vulnerability, an attacker would have to log on to an affected system and run a specially crafted application.</p> <p>The security update addresses the vulnerability by correcting how the Windows kernel handles memory addresses.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.1667 | [KB4571709](https://patchblox.com/security/data/fix/microsoft/kb4571709.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.1667 | [KB4571709](https://patchblox.com/security/data/fix/microsoft/kb4571709.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1667 | [KB4571709](https://patchblox.com/security/data/fix/microsoft/kb4571709.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.1397 | [KB4565349](https://patchblox.com/security/data/fix/microsoft/kb4565349.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.1397 | [KB4565349](https://patchblox.com/security/data/fix/microsoft/kb4565349.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.1397 | [KB4565349](https://patchblox.com/security/data/fix/microsoft/kb4565349.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1903 for 32-bit Systems |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1903 for x64-based Systems |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1909 for 32-bit Systems |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1909 for ARM64-based Systems |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 1909 for x64-based Systems |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 2004 for 32-bit Systems | 19041.450 | [KB4566782](https://patchblox.com/security/data/fix/microsoft/kb4566782.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 2004 for ARM64-based Systems | 19041.450 | [KB4566782](https://patchblox.com/security/data/fix/microsoft/kb4566782.md) | Aug 11, 2020 |
| Microsoft | Windows 10 Version 2004 for x64-based Systems | 19041.450 | [KB4566782](https://patchblox.com/security/data/fix/microsoft/kb4566782.md) | Aug 11, 2020 |
| Microsoft | Windows Server 2019 | 17763.1397 | [KB4565349](https://patchblox.com/security/data/fix/microsoft/kb4565349.md) | Aug 11, 2020 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.1397 | [KB4565349](https://patchblox.com/security/data/fix/microsoft/kb4565349.md) | Aug 11, 2020 |
| Microsoft | Windows Server, version 1903 (Server Core installation) |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows Server, version 1909 (Server Core installation) |  | [KB4565351](https://patchblox.com/security/data/fix/microsoft/kb4565351.md) | Aug 11, 2020 |
| Microsoft | Windows Server, version 2004 (Server Core installation) | 19041.450 | [KB4566782](https://patchblox.com/security/data/fix/microsoft/kb4566782.md) | Aug 11, 2020 |

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