CVE-2022-21716

HIGH

Twisted < 22.2.0 - Buffer Overflow

Title source: rule
STIX 2.1

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.

References (9)

Core 9
Core References
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/03/msg00009.html
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/202301-02
Issue Tracking, Vendor Advisory
https://twistedmatrix.com/trac/ticket/10284

Scores

CVSS v3 7.5
EPSS 0.0124
EPSS Percentile 79.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-770 CWE-120
Status published
Products (8)
debian/debian_linux 9.0
fedoraproject/fedora 35
fedoraproject/fedora 36
oracle/http_server 12.2.1.3.0
oracle/http_server 12.2.1.4.0
oracle/zfs_storage_appliance_kit 8.8
pypi/twisted 21.7.0 - 22.2.0PyPI
twisted/twisted 21.7.0 - 22.2.0
Published Mar 03, 2022
Tracked Since Feb 18, 2026