What is the CVSS score of CVE-2022-21716?

CVE-2022-21716 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 3.6%.

Is there a public PoC exploit available for CVE-2022-21716?

Yes, a public proof-of-concept exploit is available for CVE-2022-21716. Prioritise patching immediately. EPSS: 3.6%.

Is there a patch available for CVE-2022-21716?

Yes, a patch is available for CVE-2022-21716. Update the affected software to the latest version immediately.

Python CVE-2022-21716

HIGH

Classic Buffer Overflow (CWE-120)

2022-03-03 security-advisories@github.com

Buffer Overflow Python Twisted Debian Linux Http Server Zfs Storage Appliance Kit Fedora

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Mar 03, 2022 - 21:15 nvd

HIGH 7.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

19 pypi packages depend on twisted (19 direct, 0 indirect)

Ecosystem-wide dependent count for version 21.7.0.

DescriptionNVD

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.

AnalysisAI

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. 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 products include: Twisted, Debian Debian Linux, Oracle Http Server, Oracle Zfs Storage Appliance Kit, Fedoraproject Fedora. Version information: Prior to 22.2.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.