CVE-2023-6857
Medium
Description
When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary. *This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected.* This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Mozilla Firefox
PublishedDec 19, 2023
First seenDec 19, 2023
How to fix
Update
- mozilla firefox121.0 or later
- mozilla firefox_esr115.6 or later
- mozilla thunderbird115.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 121.0 | 121.0 |
| mozilla firefox_esr | v < 115.6 | 115.6 |
| mozilla thunderbird | v < 115.6 | 115.6 |
| debian debian_linux | 10.0, 11.0, 12.0 | — |
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