CVE-2020-1383: Windows RRAS Service Information Disclosure Vulnerability

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-08-17 · updated 2026-06-17

Description

An information disclosure vulnerability exists in RPC if the server has Routing and Remote Access enabled. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system To exploit this vulnerability, an attacker would need to run a specially crafted application against an RPC server which has Routing and Remote Access enabled. Routing and Remote Access is a non-default configuration; systems without it enabled are not vulnerable. The security update addresses the vulnerability by correcting how the Routing and Remote Access service handles requests.

Affected products

Microsoft Windows 10 Version 1607: 1607, 1709, 1803, 1809, 1903, 1909 (+1)
Microsoft Windows 7: all versions
Microsoft Windows 8.1: all versions
Microsoft Windows RT 8.1: all versions
Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: 1903, 1909, 2004
Microsoft Windows Server 2019: all versions
Microsoft Windows 10 Version 1507: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 1607: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 1709: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 Version 1709 for 32-bit Systems: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 1803: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 Version 1903 for 32-bit Systems: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 Version 1903 for ARM64-based Systems: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 Version 1903 for x64-based Systems: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 1909: from 10.0.0 before publication — fixed in publication
Microsoft Windows 10 2004: from 10.0.0 before publication — fixed in publication
Microsoft Windows 7: from 6.1.0 before publication — fixed in publication
Microsoft Windows 7 Service Pack 1: from 6.1.0 before publication — fixed in publication
Microsoft Windows 8.1: from 6.3.0 before publication — fixed in publication
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.0 before publication — fixed in publication
Microsoft Windows Server 2012: from 6.2.0 before publication — fixed in publication
Microsoft Windows Server 2012 R2: from 6.3.0 before publication — fixed in publication
Microsoft Windows Server 2016: from 10.0.0 before publication — fixed in publication
Microsoft Windows Server 2019: from 10.0.0 before publication — fixed in publication
Microsoft Windows Server, version 1903 (Server Core installation): from 10.0.0 before publication — fixed in publication
Microsoft Windows Server, version 1909 (Server Core installation): from 10.0.0 before publication — fixed in publication
Microsoft Windows Server version 2004: from 10.0.0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 publication; Microsoft Windows 10 1607 publication; Microsoft Windows 10 1709 publication; Microsoft Windows 10 Version 1709 for 32-bit Systems publication; Microsoft Windows 10 1803 publication; Microsoft Windows 10 publication; Microsoft Windows 10 Version 1903 for 32-bit Systems publication; Microsoft Windows 10 Version 1903 for ARM64-based Systems publication; Microsoft Windows 10 Version 1903 for x64-based Systems publication; Microsoft Windows 10 1909 publication; Microsoft Windows 10 2004 publication; Microsoft Windows 7 publication. Check the vendor advisory for mitigations.

References

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