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Public proof of conceptFix available

CVE-2020-9283

A public proof of concept exists; no exploitation attested.

  • Published2020-02-20
  • Fixed in0.0.0-20200220183623-bac4c82f6975
  • WeaknessCWE-347

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-02-2020:15CVE publishedNVD
  2. 2020-02-24Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-9283?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-9283?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD
golang.org/x/crypto
BranchAffectedFixed in
0.0< 0.0.0-20200220183623-bac4c82f69750.0.0-20200220183623-bac4c82f6975
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
Golang package ssh
BranchAffectedFixed in
0.0= 0.0.0-20200220183623-bac4c82f6975no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • dex-k8s-authenticatorChainguardall versions · fixed in 0
  • golang-go.cryptoUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • golang-go.cryptoUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • golang-go.cryptoDebian:14all versions · fixed in 1:0.0~git20200221.2aa609c-1
  • golang-go.cryptoDebian:13all versions · fixed in 1:0.0~git20200221.2aa609c-1
  • golang-go.cryptoDebian:12all versions · fixed in 1:0.0~git20200221.2aa609c-1
  • golang-go.cryptoDebian:10all versions · fixed in 1:0.0~git20181203.505ab14-1+deb10u1
  • golang-go.cryptoDebian:9all versions · fixed in 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1+deb8u1

16 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-9283 Red Hat Product Security152 products fixed · 76 known affected

    golang.org/x/crypto: Processing of crafted ssh-ed25519 public keys allows for panic

    jaeger as a component of OpenShift Service Mesh 1 · jaeger-operator as a component of OpenShift Service Mesh 1 · jaeger-operator.src as a component of OpenShift Service Mesh 1 · +73 more

  • RHSA-2021:1129 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat 3scale API Management 2.10.0 security update and release

  • RHSA-2021:0799 Red Hat Product Security5 products fixed

    Red Hat Security Advisory: OpenShift Virtualization 2.6.0 security and bug fix update

  • RHSA-2020:4298 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.6.1 image security update

  • RHSA-2020:4264 Red Hat Product Security227 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.3.40 security and bug fix update

  • RHSA-2020:3809 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.3.38 container image security update

13 more advisories

Full record on NVD

Fix

  1. Update golang.org/x/crypto to 0.0.0-20200220183623-bac4c82f6975
  2. Vendor fix Red Hat Product Security RHSA-2021:1129 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.10/html-single/installing_3scale/index
  3. Vendor fix Red Hat Product Security RHSA-2021:0799 · 5 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  4. Vendor fix Red Hat Product Security RHSA-2020:4298 · 3 productsFor OpenShift Container Platform 4.6 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.6/release_notes/ocp-4-6-r…
  5. Vendor fix Red Hat Product Security RHSA-2020:4264 · 227 productsFor OpenShift Container Platform 4.3 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.3/release_notes/ocp-4-3-r…
  6. Vendor fix Red Hat Product Security RHSA-2020:3414 · 4 productsFor OpenShift Container Platform 4.5 see the following documentation, which will be updated shortly for release 4.5.5, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.5/release_notes/ocp-4-5-…
  7. Vendor fix Red Hat Product Security RHSA-2020:3370 · 8 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://docs.openshift.com/container-platform/4.5/jaeger/jaeger_install/rhbjaeger-updating.html

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-48121
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedbrompwnie/CVE-2020-9283
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2020-02-20
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-ffhg-7mh4-33c4

Frequently asked questions

What is CVE-2020-9283?

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.

Is CVE-2020-9283 actively exploited?

Active exploitation of CVE-2020-9283 has not been confirmed. Its EPSS score was 21.1% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-9283?

CVE-2020-9283 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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