MicrosoftCVELIST:CVE-2021-43890CVE-2021-43890 Windows AppX Installer Spoofing Vulnerability
7.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
7.3 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
53.6%
CNA Affected
[
{
"vendor": "Microsoft",
"product": "App Installer",
"cpes": [
"cpe:2.3:a:microsoft:app_installer:*:*:*:*:*:*:*:*"
],
"platforms": [
"Unknown"
],
"versions": [
{
"version": "1.0.0.0",
"lessThan": "publication",
"versionType": "custom",
"status": "affected"
}
]
}
]References
github.com/ChrisTitusTech/winutil/pull/26
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43890
thehackernews.com/2023/12/microsoft-disables-msix-app-installer.html
www.bleepingcomputer.com/news/microsoft/microsoft-disables-msix-protocol-handler-abused-in-malware-attacks/
www.microsoft.com/en-us/security/blog/2023/12/28/financially-motivated-threat-actors-misusing-app-installer/
Related
7.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
7.3 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
53.6%