SB2017050908 - Multiple vulnerabilities in Win32.sys in Microsoft Windows
Published: May 9, 2017 Updated: May 10, 2017
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Elevation of privilege (CVE-ID: CVE-2017-0263)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Green
The vulnerability allows a local user to elevate privileges on the system.
The vulnerability exists due to boundary error in Win32k.sys driver. A local user can escalate privileges on the system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note: this vulnerability is being actively exploited.
2) Elevation of privilege (CVE-ID: CVE-2017-0246)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to elevate privileges on the system.
The vulnerability exists due to boundary error in Win32k.sys driver. A local user can escalate privileges on the system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Information disclosure (CVE-ID: CVE-2017-0245)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The weakness exists when the win32k component improperly provides kernel information. A local use can gain access to potentially sensitive information.
Successful exploitation of the vulnerability results in information disclosure.
Remediation
Install update from vendor's website.