SB2017041207 - Two privilege escalation vulnerabilities in Microsoft GDI

Description

This security bulletin contains information about 2 vulnerabilities.

1) Privilege escalation (CVE-ID: CVE-2017-0156)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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 escalate his privileges.

The vulnerability exists due to an error within Microsoft Graphics Component (GDI) implementation when handling objects in memory. A local user can execute arbitrary code on the target system with SYSTEM privileges.

Successful exploitation of the vulnerability may allow a local attacker to compromise vulnerable system.

2) Privilege escalation (CVE-ID: CVE-2017-0155)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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 escalate his privileges.

The vulnerability exists due to an error within Microsoft Graphics Component (GDI) implementation when handling objects in memory. A local user can execute arbitrary code on the target system with SYSTEM privileges.

Successful exploitation of the vulnerability may allow a local attacker to compromise vulnerable system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0156
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0155