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Intel CrossWalk project does not validate SSL certificates after first acceptance

Vulnerability Note VU#217871

Original Release Date: 2016-07-29 | Last Revised: 2016-07-29

Overview

The Intel Crosswalk project is a framework for developing hybrid apps for Android and iOS. The Crosswalk project does not properly handle SSL certificate validation when a user accepts an invalid certificate, preventing the app for validating any future SSL certificates.

Description

CWE-356: Product UI does not Warn User of Unsafe Actions - CVE-2016-5672

When a user makes a network request, an app using the Crosswalk project shows an initial error message if an invalid SSL certificate is found. If the user selects "OK", the app then accepts all future SSL certificates without validation. The app does not make it clear that the dialog grants permanent permission to accept invalid certificates; the user is never prompted again.

The researcher has released a security advisory with more information. Intel has also released a blog post about this issue.

Impact

A victim user that is enticed to accept an invalid SSL certificate actually accepted invalid SSL certificates indefinitely from any source, allowing possible man-in-the-middle attacks in the future from other sources.

Solution

Apply an update

The issue has been resolved in Crosswalk stable 19.49.514.5. Affected users are encouraged to upgrade as soon as possible. Developers should ensure their apps are rebuilt using the latest Crosswalk update.

Vendor Information

217871
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Intel Corporation

Notified:  June 03, 2016 Updated:  July 29, 2016

Statement Date:   July 27, 2016

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N
Temporal 4.5 E:POC/RL:OF/RC:C
Environmental 3.4 CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

Credit

Th anks to Nightwatch Cybersecurity Research for repo rting this vulnerability.

This document was written by Garret Wassermann.

Other Information

CVE IDs: CVE-2016-5672
Date Public: 2016-07-29
Date First Published: 2016-07-29
Date Last Updated: 2016-07-29 14:44 UTC
Document Revision: 15

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