Known exploited vulnerability
CVE-2019-0841
The short answer
CVE-2019-0841 affects Microsoft Windows and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-15: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0730, CVE-2019-0731, CVE-2019-0796, CVE-2019-0805, CVE-2019-0836.
Weakness: CWE-59.
Severity
7.8 high
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Mar 15, 2022
Federal due date Apr 5, 2022
EPSS, next 30 days
41%
Higher than 99% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
Windows, Windows Server. NVD's record lists the exact affected versions.
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841 PatchVendor Advisory
- www.exploit-db.com/exploits/46683/ ExploitThird Party AdvisoryVDB Entry
- www.zerodayinitiative.com/advisories/ZDI-19-360/ Third Party AdvisoryVDB Entry
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841 PatchVendor Advisory
- www.exploit-db.com/exploits/46683/ ExploitThird Party AdvisoryVDB Entry
- www.zerodayinitiative.com/advisories/ZDI-19-360/ Third Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0841 US Government Resource
Questions
Is CVE-2019-0841 being exploited?
Yes. CISA added CVE-2019-0841 to its Known Exploited Vulnerabilities catalog on 2022-03-15, with a federal remediation due date of 2022-04-05. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2019-0841?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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