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Origin Validation Error Affecting firefox package, versions <63.0+build2-0ubuntu0.16.04.2

Severity

 Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.43% (76th percentile)

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  • Snyk IDSNYK-UBUNTU1604-FIREFOX-422242
  • published28 Oct 2018
  • disclosed28 Feb 2019
Report a new vulnerability Found a mistake?

Introduced: 28 Oct 2018

CVE-2018-12402  (opens in a new tab)
CWE-346  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 firefox to version 63.0+build2-0ubuntu0.16.04.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

The internal WebBrowserPersist code does not use correct origin context for a resource being saved. This manifests when sub-resources are loaded as part of "Save Page As..." functionality. For example, a malicious page could recover a visitor's Windows username and NTLM hash by including resources otherwise unreachable to the malicious page, if they can convince the visitor to save the complete web page. Similarly, SameSite cookies are sent on cross-origin requests when the "Save Page As..." menu item is selected to save a page, which can result in saving the wrong version of resources based on those cookies. This vulnerability affects Firefox < 63.