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Improper Input Validation Affecting thunderbird package, versions <0:52.2.0-1.el7_3

Severity

 Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.31% (71st percentile)

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  • Snyk IDSNYK-RHEL7-THUNDERBIRD-4755327
  • published26 Jul 2021
  • disclosed14 Jun 2017
Report a new vulnerability Found a mistake?

Introduced: 14 Jun 2017

CVE-2017-7764  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade RHEL:7 thunderbird to version 0:52.2.0-1.el7_3 or higher.
This issue was patched in RHSA-2017:1561.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

Characters from the "Canadian Syllabics" unicode block can be mixed with characters from other unicode blocks in the addressbar instead of being rendered as their raw "punycode" form, allowing for domain name spoofing attacks through character confusion. The current Unicode standard allows characters from "Aspirational Use Scripts" such as Canadian Syllabics to be mixed with Latin characters in the "moderately restrictive" IDN profile. We have changed Firefox behavior to match the upcoming Unicode version 10.0 which removes this category and treats them as "Limited Use Scripts.". This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.