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CVE-2022-21716— Buffer Overflow in Twisted

Quick assessment

Affected
twisted twisted
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Twisted是一款使用Python语言编写的事件驱动的开源网络引擎。 Twisted v22.2.0之前版本存在安全漏洞，攻击者可利用该漏洞导致一个缓冲区使用所有可用的内存。

CVSS 7.5 · High EPSS 3.51% · P88

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-21716

Vulnerability Information
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Vulnerability Title
Buffer Overflow in Twisted
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Twisted 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Twisted是一款使用Python语言编写的事件驱动的开源网络引擎。 Twisted v22.2.0之前版本存在安全漏洞，攻击者可利用该漏洞导致一个缓冲区使用所有可用的内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
twisted twisted < 22.2.0 -

II. Public POCs for CVE-2022-21716

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III. Intelligence Information for CVE-2022-21716

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Patches & Fixes for CVE-2022-21716 (1)

Vendor Advisories for CVE-2022-21716 (2)

Mailing List Discussions for CVE-2022-21716 (2)

Other References for CVE-2022-21716 (2)

IV. Related Vulnerabilities

Same product: twisted
Same vendor: twisted
Same weakness: CWE-120

V. Comments for CVE-2022-21716

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