CVE-2022-21716
moderate-risk
Published 2022-03-03
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.
Do I need to act?
~
1.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (7)
Affected Vendors
References (18)
Third Party Advisory
https://security.gentoo.org/glsa/202301-02
Issue Tracking
https://twistedmatrix.com/trac/ticket/10284
Third Party Advisory
https://security.gentoo.org/glsa/202301-02
Issue Tracking
https://twistedmatrix.com/trac/ticket/10284
44
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
4/34 · Minimal
Exposure
14/34 · Moderate