CVE-2023-3417 File Extension Spoofing using the Text Direction Override Character
Attackers can spoof file extensions using Unicode characters to disguise executables as documents, bypassing user security checks in Thunderbird.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-3417?
CVE-2023-3417 is a high-severity vulnerability in Debian Debian Linux, published on 24 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2023-3417?
It affects 2 products.
Linux distribution packages (1)
MozillaThunderbird openSUSE:Tumbleweed | All versions | 102.13.1-1.1 |
Products include Debian Debian Linux, Mozilla Thunderbird.
How do I fix CVE-2023-3417?
Upgrade to a fixed version.
Is CVE-2023-3417 being exploited?
There is no known exploitation of CVE-2023-3417 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2023-3417, DLA-3510-1, DSA-5463-1, GHSA-xpxg-5vmj-vx9g, UBUNTU-CVE-2023-3417, openSUSE-SU-2024:13072-1.