CVE-2021-4221

Summary

If a domain name contained a RTL character, it would cause the domain to be rendered to the right of the path. This could lead to user confusion and spoofing attacks. <br>This bug only affects Firefox for Android. Other operating systems are unaffected.<br>Note: Due to a clerical error this advisory was not included in the original announcement, and was added in Feburary 2022. This vulnerability affects Firefox < 92.

Affected Software

Weaknesses

• Address bar spoofing on Firefox for Android due to RTL characters

ADP Enrichment

CVE Program Container

Additional References

• https://www.mozilla.org/security/advisories/mfsa2021-38/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1704422

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

References

• https://www.mozilla.org/security/advisories/mfsa2021-38/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1704422

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