SB2020031028 - Multiple vulnerabilities in Microsoft Windows Hard Link
Published: March 10, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0849)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the way Windows handles hard links. A local user can create a malicious application, launch it on the system and overwrite a targeted file leading to an elevated status.
To exploit this vulnerability, an attacker would first have to log on to the system.
2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0841)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the way Windows handles hard links. A local user can create a malicious application, launch it on the system and overwrite a targeted file leading to an elevated status.
To exploit this vulnerability, an attacker would first have to log on to the system.
3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0840)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the way Windows handles hard links. A local user can create a malicious application, launch it on the system and overwrite a targeted file leading to an elevated status.
To exploit this vulnerability, an attacker would first have to log on to the system.
4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0896)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the way Windows handles hard links. A local user can create a malicious application, launch it on the system and overwrite a targeted file leading to an elevated status.
To exploit this vulnerability, an attacker would first have to log on to the system.
Remediation
Install update from vendor's website.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0849
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0841
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0840
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0896