CVE-2018-18494 - Origin Validation Error

Severity

43%

Complexity

86%

Confidentiality

48%

CVSS 3.0 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N).

Demo Examples

Origin Validation Error

CWE-346

This Android application will remove a user account when it receives an intent to do so:


               
}
}
destroyUserData(userID);

This application does not check the origin of the intent, thus allowing any malicious application to remove a user. Always check the origin of an intent, or create a whitelist of trusted applications using the manifest.xml file.

Origin Validation Error

CWE-346

These Android and iOS applications intercept URL loading within a WebView and perform special actions if a particular URL scheme is used, thus allowing the Javascript within the WebView to communicate with the application:


               
}// Android
}
}
return false;
return true;

               
}// iOS
return YES;
return NO;
UIWebView *webView = [self writeDataToView:[URL query]];// Make data available back in webview.

A call into native code can then be initiated by passing parameters within the URL:


               
window.location = examplescheme://method?parameter=value

Because the application does not check the source, a malicious website loaded within this WebView has the same access to the API as a trusted site.

Overview

First reported 5 years ago

2019-02-28 18:29:00

Last updated 5 years ago

2019-03-11 15:09:00

Affected Software

Mozilla Firefox

Mozilla Thunderbird

Debian Linux 8.0 (Jessie)

8.0

Debian Linux 9.0

9.0

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Canonical Ubuntu Linux 18.04 LTS Edition

18.04

Canonical Ubuntu Linux 18.10

18.10

Red Hat Enterprise Linux Desktop 6.0

6.0

RedHat Enterprise Linux Desktop 7.0

7.0

Red Hat Enterprise Linux Server 6.0

6.0

RedHat Enterprise Linux Server 7.0

7.0

Red Hat Enterprise Linux Server Advanced mission critical Update Support (AUS) 7.6

7.6

Red Hat Enterprise Linux Server Extended Update Support (EUS) 7.6

7.6

Red Hat Enterprise Linux Server Telecommunications Update Service (TUS) 7.6

7.6

Red Hat Enterprise Linux Workstation 6.0

6.0

RedHat Enterprise Linux Workstation 7.0

7.0

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