CVE-2018-8337 - Improper Handling of Case Sensitivity

Severity

46%

Complexity

39%

Confidentiality

106%

A security feature bypass vulnerability exists when Windows Subsystem for Linux improperly handles case sensitivity, aka "Windows Subsystem for Linux Security Feature Bypass Vulnerability." This affects Windows 10, Windows 10 Servers.

A security feature bypass vulnerability exists when Windows Subsystem for Linux improperly handles case sensitivity, aka "Windows Subsystem for Linux Security Feature Bypass Vulnerability." This affects Windows 10, Windows 10 Servers.

CVSS 3.0 Base Score 5.3. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

CVSS 2.0 Base Score 4.6. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P).

Demo Examples

Improper Handling of Case Sensitivity

CWE-178

In the following example, an XSS neutralization method replaces script tags in user supplied input with a safe equivalent:


               
}
return input.replaceAll("script", mask);

The code only works when the "script" tag is in all lower-case, forming an incomplete blacklist (CWE-184). Equivalent tags such as "SCRIPT" or "ScRiPt" will not be neutralized by this method, allowing an XSS attack.

Overview

Type

Microsoft Windows

First reported 6 years ago

2018-09-13 00:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Microsoft Windows 10 1709

1709

Microsoft Windows Server 2016 1709

1709

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