CVE-2019-16770
Medium
Description
In Puma before versions 3.12.2 and 4.3.1, a poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack. If more keepalive connections to Puma are opened than there are threads available, additional connections will wait permanently if the attacker sends requests frequently enough. This vulnerability is patched in Puma 4.3.1 and 3.12.2.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Puma
PublishedDec 5, 2019
First seenDec 5, 2019
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- puma puma3.12.2, 4.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| puma puma | 3.0.0 ≤ v < 3.12.2, 4.0.0 ≤ v < 4.3.1 | 3.12.2, 4.3.1 |
| debian debian_linux | 9.0 | — |
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