Multiple vulnerabilities in HTTP.sys implementation in Microsoft Windows

Published: 2018-06-12 21:24:11
Severity High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2018-8226
CVE-2018-8231
CVSSv3 6.4 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
8.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CWE ID CWE-20
CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software Windows
Windows Server
Vulnerable software versions Windows 10
Windows Server 2016
Vendor URL Microsoft

Security Advisory

1) Improper input validation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an error when processing HTTP 2.0 requests within the HTTP.sys driver. A remote attacker can send a specially crafted HTTP response to vulnerable system and crash it.

Successful exploitation of the vulnerability may allow an attacker to perform a denial of service attack.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8226

2) Buffer overflow

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error within the HTTP Protocol Stack (Http.sys). A remote unauthenticated attacker can send a specially crafted packet to a targeted Http.sys server, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8231

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