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.
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
Link | Tags |
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https://www.znuny.com | product |
https://www.znuny.org/en/advisories | vendor advisory |
https://www.znuny.org/en/advisories/zsa-2024-04 | vendor advisory |