Vulnerability Details CVE-2022-21716
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.009
EPSS Ranking 74.3%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
- https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9
- https://github.com/twisted/twisted/releases/tag/twisted-22.2.0
- https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx
- https://lists.debian.org/debian-lts-announce/2022/03/msg00009.html
- 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/202301-02
- https://twistedmatrix.com/trac/ticket/10284
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9
- https://github.com/twisted/twisted/releases/tag/twisted-22.2.0
- https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx
- https://lists.debian.org/debian-lts-announce/2022/03/msg00009.html
- 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/202301-02
- https://twistedmatrix.com/trac/ticket/10284
- https://www.oracle.com/security-alerts/cpuapr2022.html
Products affected by CVE-2022-21716
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cpe:2.3:a:oracle:http_server:12.2.1.3.0
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cpe:2.3:a:oracle:http_server:12.2.1.4.0
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cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8
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cpe:2.3:a:twisted:twisted:21.7.0
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cpe:2.3:a:twisted:twisted:22.1.0
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cpe:2.3:o:debian:debian_linux:9.0
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cpe:2.3:o:fedoraproject:fedora:35
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cpe:2.3:o:fedoraproject:fedora:36