THREATPORT/VULNERABILITY/CVE-2022-21716
HIGH SEVERITY

CVE-2022-21716

Twisted vulnerability

CVSS
7.5
EPSS
3.5%
EPSS pct
88th
Exploited
No known
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.
Affected vendor
Twisted
Affected product
Twisted
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-120 — Classic Buffer Overflow
  • CWE-770 — Allocation of Resources Without Limits or Throttling
Published
2022-03-03

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2022-21716

  • Confirm whether Twisted Twisted is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2022-21716.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2022-21716

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