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Vulnerability record · CVE-2020-9283 · published 20 February 2020

CVE-2020-9283: Golang package ssh improper verification of cryptographic signature vulnerability

Golang · Package Ssh

golang.org/x/crypto before v0.0.0-20200220183623-bac4c82f6975 for Go allows a panic during signature verification in the golang.org/x/crypto/ssh package. A client can attack an SSH server that accepts public keys. Also, a server can attack any SSH client.

7.5 CVSS 3.1 High EPSS 21% · top 2.6% CWE-347 · Improper verification of cryptographic signature
7.5CVSS 3.1 base score, v2 5.0
21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

golang.org/x/crypto before v0.0.0-20200220183623-bac4c82f6975 for Go allows a panic during signature verification in the golang.org/x/crypto/ssh package. A client can attack an SSH server that accepts public keys. Also, a server can attack any SSH client.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html ExploitThird Party AdvisoryVDB Entry
https://groups.google.com/forum/#%21topic/golang-announce/3L45YRc91SY
https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/11/msg00027.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/11/msg00031.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html
http://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html ExploitThird Party AdvisoryVDB Entry
https://groups.google.com/forum/#%21topic/golang-announce/3L45YRc91SY
https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/11/msg00027.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/11/msg00031.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html

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Source: NIST National Vulnerability Database (record CVE-2020-9283), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.