PT-2018-1559 · Microsoft · Windows Server 2016+10

Amichai Shulman + 2 · Published 2018-09-11 · Updated 2018-11-06 · CVE-2018-8271

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Windows versions prior to the fixed version Windows 7 Windows Server 2012 R2 Windows RT 8.1 Windows Server 2008 Windows Server 2012 Windows 8.1 Windows Server 2016 Windows Server 2008 R2 Windows 10 Windows 10 Servers

Description An information disclosure issue exists due to the Windows bowser.sys kernel-mode driver's failure to properly handle objects in memory. This could allow an attacker to access the contents of system memory, potentially obtaining sensitive information and affecting the system.

Recommendations For Windows 7, update to a newer version that contains a fix for this issue. For Windows Server 2012 R2, update to a newer version that contains a fix for this issue. For Windows RT 8.1, update to a newer version that contains a fix for this issue. For Windows Server 2008, update to a newer version that contains a fix for this issue. For Windows Server 2012, update to a newer version that contains a fix for this issue. For Windows 8.1, update to a newer version that contains a fix for this issue. For Windows Server 2016, update to a newer version that contains a fix for this issue. For Windows Server 2008 R2, update to a newer version that contains a fix for this issue. For Windows 10, update to a newer version that contains a fix for this issue. For Windows 10 Servers, update to a newer version that contains a fix for this issue. As a temporary workaround, consider restricting access to the bowser.sys kernel-mode driver until a patch is available.

Fix

Buffer Overflow

Information Disclosure

Weakness Enumeration

CWE-119

CWE-200

Related Identifiers

BDU:2018-01114

CVE-2018-8271

Affected Products

Windows

Windows 10

Windows 10 Servers

Windows 7

Windows 8.1

Windows Rt 8.1

Windows Server 2008

Windows Server 2008 R2

Windows Server 2012

Windows Server 2012 R2

Windows Server 2016

References · 8

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8271 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-8271 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-8271 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8271 · Vendor Advisory
• https://bdu.fstec.ru/vul/2018-01114 · Security Note
• https://osv.dev/vulnerability/CVE-2018-8271 · Vendor Advisory
• http://securitytracker.com/id/1041635 · Note
• http://securityfocus.com/bid/105247 · Note