SB2018071020 - Multiple vulnerabilities in Microsoft Windows

Description

This security bulletin contains information about 3 vulnerabilities.

1) Memory corruption (CVE-ID: CVE-2018-8309)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to improper handling of objects in memory. A local attacker can run a specially crafted application, trigger memory corruption and cause a target system to stop responding.

2) Privilege escalation (CVE-ID: CVE-2018-8314)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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 attacker to gain elevated privileges on the target system.

The vulnerability exists due to a sandbox escape when Windows file picker handles paths. A local attacker can use the sandbox escape to gain SYSTEM privileges.

3) Privilege escalation (CVE-ID: CVE-2018-8313)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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 attacker to gain elevated privileges on the target system.

The vulnerability exists due to improper enforcement of permissions by the Windows Kernel API. A local attacker can run a specially crafted application to impersonate processes, interject cross-process communication, or interrupt system functionality.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8309
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8314
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8313