ASA-2019-00431 – Mozilla Firefox and Thunderbird: Script injection within domain through inner window reuse


Allele Security Alert

ASA-2019-00431

Identifier(s)

ASA-2019-00431, CVE-2019-11711, MFSA2019-21, MFSA2019-22, MFSA2019-23

Title

Script injection within domain through inner window reuse

Vendor(s)

Mozilla Foundation

Product(s)

Mozilla Firefox
Mozilla Firefox ESR
Mozilla Thunderbird

Affected version(s)

Mozilla Firefox versions before 68
Mozilla Firefox ESR versions before 60.8
Mozilla Thunderbird versions before 60.8

Fixed version(s)

Mozilla Firefox version 68
Mozilla Firefox ESR version 60.8
Mozilla Thunderbird version 60.8

Proof of concept

Unknown

Description

When an inner window is reused, it does not consider the use of document.domain for cross-origin protections. If pages on different subdomains ever cooperatively use document.domain, then either page can abuse this to inject script into arbitrary pages on the other subdomain, even those that did not use document.domain to relax their origin security.

Technical details

Unknown

Credits

Boris Zbarsky

Reference(s)

Mozilla Foundation Security Advisory 2019-21
https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11711

Mozilla Foundation Security Advisory 2019-22
https://www.mozilla.org/en-US/security/advisories/mfsa2019-22/#CVE-2019-11711

Mozilla Foundation Security Advisory 2019-23
https://www.mozilla.org/en-US/security/advisories/mfsa2019-23/#CVE-2019-11711

Bug 1552541
https://bugzilla.mozilla.org/show_bug.cgi?id=1552541

CVE-2019-11711
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11711

CVE-2019-11711
https://nvd.nist.gov/vuln/detail/CVE-2019-11711

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Last modified: July 23, 2019

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