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CVE-2020-0683: Microsoft Windows Installer Privilege Escalation Vulnerability

criticalknown exploitedpublic exploitCVE-2020-0683
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Microsoft Windows Installer contains a privilege escalation vulnerability when MSI packages process symbolic links, which allows attackers to bypass access restrictions to add or remove files.

CSIRTS triage

vendor: Microsoftproduct: Windows InstallerPrivilege escalation
What
There is a privilege escalation vulnerability when MSI packages process symbolic links.
Who is affected
Deployments of Microsoft Windows Installer are affected.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Apply the latest security updates from Microsoft.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-0683

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2020-0683coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows Installer

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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