CVE-2019-19331
High
Description
knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).
SeverityHigh
CVSS7.5
Exploit probability—
Product
Nic Knot Resolver
PublishedDec 16, 2019
First seenDec 16, 2019
Weakness typeCWE-407CWE-407
How to fix
Update
- nic knot_resolver4.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nic knot_resolver | v < 4.3.0 | 4.3.0 |
| debian debian_linux | 10.0 | — |
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