CVE-2022-21716
Buffer Overflow in Twisted
- State
- Published
- Severity
- 7.5 High
- Published
- Mar 3, 2022
- Updated
- Apr 22, 2025
- Reserved
- Nov 16, 2021
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected Products
| Product | Versions |
|---|---|
twistedtwisted |
|
References
- https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx
- https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9
- https://github.com/twisted/twisted/releases/tag/twisted-22.2.0
- https://twistedmatrix.com/trac/ticket/10284
- [debian-lts-announce] 20220308 [SECURITY] [DLA 2938-1] twisted security updatemailing-list
- https://www.oracle.com/security-alerts/cpuapr2022.html
- FEDORA-2022-71b66d4747vendor-advisory
- FEDORA-2022-9a489fa494vendor-advisory
- GLSA-202301-02vendor-advisory
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