CVE-2022-21716
High
Description
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 < /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Twisted
PublishedMar 3, 2022
First seenMar 3, 2022
Weakness typeCWE-120CWE-120
How to fix
Update
- twisted twisted22.2.0 or later
- twisted22.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| twisted twisted | 21.7.0 ≤ v < 22.2.0 | 22.2.0 |
| debian debian_linux | 9.0 | — |
| oracle http_server | 12.2.1.3.0, 12.2.1.4.0 | — |
| oracle zfs_storage_appliance_kit | 8.8 | — |
| fedoraproject fedora | 35, 36 | — |
| twistedPyPI | 21.7.0 ≤ v < 22.2.0 | 22.2.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.