CVE-2022-21716 Buffer Overflow in Twisted

2022-03-0300:00:00

CWE-120

GitHub_M

www.cve.org

twisted

buffer overflow

ssh

python 3.6

cve-2022-21716

patch available

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.8

Confidence

High

EPSS

0.004

Percentile

73.2%

JSON

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.

CNA Affected

[
  {
    "vendor": "twisted",
    "product": "twisted",
    "versions": [
      {
        "version": "< 22.2.0",
        "status": "affected"
      }
    ]
  }
]