CVE-2023-3417

File Extension Spoofing using the Text Direction Override Character

EPSS 0.6%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 Jul 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Thunderbird allowed the Text Direction Override Unicode Character in filenames. An email attachment could be incorrectly shown as being a document file, while in fact it was an executable file. Newer versions of Thunderbird will strip the character and show the correct file extension. This vulnerability affects Thunderbird < 115.0.1 and Thunderbird < 102.13.1.

Affected products

Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1835582 https://lists.debian.org/debian-lts-announce/2023/07/msg00032.html https://www.debian.org/security/2023/dsa-5463 https://www.mozilla.org/security/advisories/mfsa2023-27/https://www.mozilla.org/security/advisories/mfsa2023-28/