Vulnerability · Published Jul 24, 2023 · Assigned by mozilla
CVE-2023-3417File Extension Spoofing using the Text Direction Override Character
High 7.5
In plain English
A high-severity security flaw in Thunderbird from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)0.7%top 47.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | thunderbird | 102.14.0-1.el8_8.alma | ALSA-2023:4497 |
| AlmaLinux:9 | thunderbird | 102.14.0-1.el9_2.alma | ALSA-2023:4499 |
| Debian:12 | thunderbird | 1:102.13.1-1~deb12u1 | DEBIAN-CVE-2023-3417 |
| Debian:12 | thunderbird | 1:102.13.1-1~deb12u1 | DSA-5463-1 |
| Debian:13 | thunderbird | 1:102.13.1-1 | DEBIAN-CVE-2023-3417 |
| Debian:14 | thunderbird | 1:102.13.1-1 | DEBIAN-CVE-2023-3417 |
| Rocky Linux:8 | thunderbird | 0:102.14.0-1.el8_8 | RLSA-2023:4497 |
| Rocky Linux:9 | thunderbird | 0:102.14.0-1.el9_2 | RLSA-2023:4499 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.15.0+build1-0ubuntu0.22.04.1 | USN-6333-1 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.15.0+build1-0ubuntu0.22.04.1 | UBUNTU-CVE-2023-3417 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 115.0.1 |
| Mozilla | Thunderbird | unspecified – before 102.13.1 |