SB2016071307 - Two vulnerabilities in Windows Print Spooler service
Published: July 13, 2016
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Privilege escalation in Windows Print Spooler service (CVE-ID: CVE-2016-3239)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
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 vulnerable system.
The vulnerability exists due to Windows Print Spooler service allows arbitrary writing to the file system to unprivileged users. A local user can overwrite arbitrary files on the system.
Successful exploitation of this vulnerability may allow a local user to execute arbitrary code on the target system with elevated privileges.
2) Driver validation error in Windows Print Spooler service (CVE-ID: CVE-2016-3238)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
A remote attacker with access to local network can execute arbitrary code on the target system.
Windows Print Spooler service fails to properly validate print drivers when installing a printer from the server. A remote attacker with access to local network can perform MitM (man-in-the-middle) attack against workstation or print server and install malicious driver onto vulnerable system
Successful exploitation of this vulnerability may allow a remote attacker to gain complete access to vulnerable system.
Remediation
Install update from vendor's website.