CVE-2022-21716
Twisted is an event-based framework for internet applications, supporting Python 3.6+.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.51% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120, CWE-770
- Affected
- twisted/twisted · debian/debian linux · oracle/http server · oracle/zfs storage appliance kit · fedoraproject/fedora
- Source
- security-advisories@github.com
References
- https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9Patch, Third Party Advisory
- https://github.com/twisted/twisted/releases/tag/twisted-22.2.0Release Notes, Third Party Advisory
- https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgxExploit, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00009.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/
- https://security.gentoo.org/glsa/202301-02Third Party Advisory
- https://twistedmatrix.com/trac/ticket/10284Issue Tracking, Vendor Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9Patch, Third Party Advisory
- https://github.com/twisted/twisted/releases/tag/twisted-22.2.0Release Notes, Third Party Advisory
- https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgxExploit, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00009.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/
- https://security.gentoo.org/glsa/202301-02Third Party Advisory
- https://twistedmatrix.com/trac/ticket/10284Issue Tracking, Vendor Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.