CVE-2022-21716
Published: 3 March 2022
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.
Priority
Status
Package | Release | Status |
---|---|---|
twisted
Launchpad, Ubuntu, Debian |
bionic |
Released
(17.9.0-2ubuntu0.3)
|
focal |
Released
(18.9.0-11ubuntu0.20.04.2)
|
|
impish |
Released
(20.3.0-7ubuntu1.1)
|
|
jammy |
Released
(22.1.0-2ubuntu2.1)
|
|
trusty |
Released
(13.2.0-1ubuntu1.2+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(22.2.0)
|
|
xenial |
Released
(16.0.0-1ubuntu0.4+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9
- https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx
- https://twistedmatrix.com/trac/ticket/10284
- https://github.com/twisted/twisted/releases/tag/twisted-22.2.0
- https://ubuntu.com/security/notices/USN-5354-1
- https://ubuntu.com/security/notices/USN-5354-2
- https://www.cve.org/CVERecord?id=CVE-2022-21716
- NVD
- Launchpad
- Debian