ASA-2019-00438 – Mozilla Firefox: Caret character improperly escaped in origins


Allele Security Alert

ASA-2019-00438

Identifier(s)

ASA-2019-00438, CVE-2019-11717, MFSA2019-21

Title

Caret character improperly escaped in origins

Vendor(s)

Mozilla

Product(s)

Mozilla Firefox

Affected version(s)

Mozilla Firefox version before 68

Fixed version(s)

Mozilla Firefox version 68

Proof of concept

Unknown

Description

A vulnerability exists where the caret (“^”) character is improperly escaped constructing some URIs due to it being used as a separator, allowing for possible spoofing of origin attributes.

Technical details

Unknown

Credits

Tyson Smith

Reference(s)

Mozilla Foundation Security Advisory 2019-21
https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11717

Bug 1548306
https://bugzilla.mozilla.org/show_bug.cgi?id=1548306

CVE-2019-11717
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11717

CVE-2019-11717
https://nvd.nist.gov/vuln/detail/CVE-2019-11717

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Last modified: July 17, 2019

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