CVE-2019-1064
published 2019-06-12CVE-2019-1064: An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully…
PriorityP184high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
KEVITWEXPLOITRansomware
CISA Known Exploited Vulnerabilitydue 2022-04-05
Exploited in the wild
EPSS
6.89%
93.3th percentile
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data.
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.
The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < publication | publication |
| microsoft | windows_10_version_1703 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1709 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1709_for_32-bit_systems | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1803 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1809 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < publication | publication |
| microsoft | windows_10_version_1903_for_32-bit_systems | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1903_for_arm64-based_systems | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1903_for_x64-based_systems | >= 10.0.0 < publication | publication |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < publication | publication |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < publication | publication |
| msrc | windows_10_version_1607 | — | — |
| msrc | windows_10_version_1703 | — | — |
| msrc | windows_10_version_1709 | — | — |
| msrc | windows_10_version_1803 | — | — |
| msrc | windows_10_version_1809 | — | — |
| msrc | windows_10_version_1903 | — | — |
| msrc | windows_server_2016 | — | — |
| msrc | windows_server_2019 | — | — |
| msrc | windows_server_version_1709 | — | — |
| msrc | windows_server_version_1803 | — | — |
| msrc | windows_server_version_1903 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
yara↗
rule HKTL_NET_GUID_CVE_2019_1064 {
meta:
description = "Detects c# red/black-team tools via typelibguid"
reference = "https://github.com/RythmStick/CVE-2019-1064"
author = "Arnim Rupp"
date = "2020-12-28"
strings:
$typelibguid0 = "ff97e98a-635e-4ea9-b2d0-1a13f6bdbc38" ascii nocase wide
condition:
(uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and any of them
}- →Detect CVE-2019-1064 exploit tools (C# PE binaries) by scanning for the TypeLib GUID ff97e98a-635e-4ea9-b2d0-1a13f6bdbc38 in PE files (MZ header + PE signature check) ↗
- →The exploit abuses Windows AppX Deployment Service (AppXSVC) via improper hard link handling to achieve privilege escalation; monitor for unusual hard link creation activity by non-privileged users targeting AppXSVC-managed paths ↗
- ·Exploit is publicly disclosed and rated 'Exploitation More Likely' for both latest and older software releases; treat as high-priority patching target ↗
- ·YARA rule targets C# (.NET) PE binaries only; non-.NET or recompiled variants of the exploit tool will not be detected by the TypeLib GUID signature ↗
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.2HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
vulncheck7.8HIGH
cisa7.8HIGH
vendor_msrc7.8HIGH
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CISA
Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
cisa·2022-03-15·CVSS 7.8
CVE-2019-1064 [HIGH] CWE-59 Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
Vulnerability: Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
Affected: Microsoft Windows
A privilege escalation vulnerability exists when Windows AppXSVC improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context.
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2019-1064
Remediation Due Date: 2022-04-05
Microsoft
Windows Elevation of Privilege Vulnerability
vendor_msrc·2019-06-11·CVSS 7.8
CVE-2019-1064 [HIGH] Windows Elevation of Privilege Vulnerability
Windows Elevation of Privilege Vulnerability
Description: An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data.
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.
The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.
Microsoft Windows: Microsoft Windows
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Eleva
GHSA
GHSA-7q5j-w2g3-7f8v: An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of
ghsa_unreviewed·2022-05-24
CVE-2019-1064 [HIGH] CWE-59 GHSA-7q5j-w2g3-7f8v: An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'.
VulnCheck
Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
vulncheck·2019·CVSS 7.8
CVE-2019-1064 [HIGH] CWE-59 Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
A privilege escalation vulnerability exists when Windows AppXSVC improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context.
Affected: Microsoft Windows
Required Action: Apply updates per vendor instructions.
Known Ransomware Campaign Use: Known
Exploitation References: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json; https://www.tenable.com/blog/contileaks-chats-reveal-over-30-vulnerabilities-used-by-conti-ransomware-affiliates; https://www.securin.io/articles/all-about-conti-ransomware/
Exploit PoC: https://vulncheck.com/xdb/63dee87b89a7; https://vulncheck.com/xdb/fc46b3dba1ae; https://vul
No public exploits indexed.
Tenable
ContiLeaks: Chats Reveal Over 30 Vulnerabilities Used by Conti Ransomware – How Tenable Can Help
blogs_tenable·2022-03-24
ContiLeaks: Chats Reveal Over 30 Vulnerabilities Used by Conti Ransomware – How Tenable Can Help
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Tenable
Microsoft’s July 2019 Patch Tuesday: What You Need to Know
blogs_tenable·2019-07-09
Microsoft’s July 2019 Patch Tuesday: What You Need to Know
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
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## AI Exposure
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Krebs
Microsoft Patch Tuesday, June 2019 Edition
blogs_krebs·2019-06-12·CVSS 7.8
[HIGH] Microsoft Patch Tuesday, June 2019 Edition
Microsoft on Tuesday released updates to fix 88 security vulnerabilities in its Windows operating systems and related software. The most dangerous of these include four flaws for which there is already exploit code available. There’s also a scary bug affecting all versions of Microsoft Office that can be triggered by a malicious link or attachment. And of course Adobe has its customary monthly security update for Flash Player .
Microsoft says it has so far seen no exploitation against any of the four flaws that were disclosed publicly prior to their patching this week — nor against any of the 88 bugs quashed in this month’s release. All four are privilege escalation flaws: CVE-2019-1064 and CVE-2019-1069 affect Windows 10 and later; CVE-2019-1053 and CVE-2019-0973 both affect all currentl
Tenable
Tenable Roundup for Microsoft's June 2019 Patch Tuesday
blogs_tenable·2019-06-11
Tenable Roundup for Microsoft's June 2019 Patch Tuesday
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Zscaler
Zscaler found Multiple Security Vulnerabilities | 06-11-2019
blogs_zscaler·CVSS 7.8
[HIGH] Zscaler found Multiple Security Vulnerabilities | 06-11-2019
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2019-06-12
Published
2022-03-15
Added to CISA KEV
Exploited in the wild