Znuny before LTS 6.5.1 through 6.5.10 and 7.0.1 through 7.0.16 allows DoS/ReDos via email. Parsing the content of emails where HTML code is copied from Microsoft Word could lead to high CPU usage and block the parsing process.
Weakness
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Znuny | Znuny | 6.0.0 (including) | 6.1.0 (excluding) |
| Znuny | Znuny | 6.5.1 (including) | 6.5.10 (including) |
| Znuny | Znuny | 7.0.1 (including) | 7.0.16 (including) |
| Znuny | Ubuntu | oracular | * |
| Znuny | Ubuntu | upstream | * |