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CVE-2022-21716

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202301-02
Posted Jan 11, 2023
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202301-2 - Multiple vulnerabilities have been discovered in Twisted, the worst of which could result in denial of service. Versions less than 22.10.0 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2022-21712, CVE-2022-21716, CVE-2022-39348
SHA-256 | b441ca2c4d874c35f758b6990de03c9569bb1b254025b76eaf5b0699fb0a4fc7
Ubuntu Security Notice USN-5354-2
Posted May 5, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5354-2 - USN-5354-1 fixed vulnerabilities in Twisted. This update provides the corresponding updates for Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 22.04 LTS. It was discovered that Twisted incorrectly processed SSH handshake data on connection establishments. A remote attacker could use this issue to cause Twisted to crash, resulting in a denial of service.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2022-21716
SHA-256 | 5f44cc2fe75b5efa351924177123cb7a0166600004087758086c8298c3914fdf
Ubuntu Security Notice USN-5354-1
Posted Mar 31, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5354-1 - It was discovered that Twisted incorrectly filtered HTTP headers when clients are being redirected to another origin. A remote attacker could use this issue to obtain sensitive information. It was discovered that Twisted incorrectly processed SSH handshake data on connection establishments. A remote attacker could use this issue to cause Twisted to crash, resulting in a denial of service.

tags | advisory, remote, web, denial of service
systems | linux, ubuntu
advisories | CVE-2022-21712, CVE-2022-21716
SHA-256 | 28a1644f437a131ccaec80f877806282a493d263fdc6b3e0fd3064a659d80b35
Red Hat Security Advisory 2022-0982-01
Posted Mar 25, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-0982-01 - Twisted is a networking engine written in Python, supporting numerous protocols. It contains a web server, numerous chat clients, chat servers, mail servers and more. Issues addressed include a denial of service vulnerability.

tags | advisory, web, denial of service, protocol, python
systems | linux, redhat
advisories | CVE-2022-21712, CVE-2022-21716
SHA-256 | 7ea3b9d6e217535fc506cc7d74db50dc8e1d695217860ec2dc4d4f25c5db0de3
Red Hat Security Advisory 2022-0992-01
Posted Mar 24, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-0992-01 - Twisted is a networking engine written in Python, supporting numerous protocols. It contains a web server, numerous chat clients, chat servers, mail servers and more. Issues addressed include a denial of service vulnerability.

tags | advisory, web, denial of service, protocol, python
systems | linux, redhat
advisories | CVE-2022-21712, CVE-2022-21716
SHA-256 | 79a19c3cbf15f775863e451c8f8686dcdb3e9de3fe286f70b8ac87b5062b8b31
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