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Fencer Vulns
high 7.5

CVE-2020-9283 in the critical feed json

Improper Verification of Cryptographic Signature in golang.org/x/crypto

published 2020-02-20 6 y ago modified 2026-09-10 1 mo ago also GHSA-ffhg-7mh4-33c4 , GO-2020-0012 , EUVD-2021-1059

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
21.1%
EPSS 21.1% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • go golang.org/x/crypto 0.0.0-20200220183623-bac4c82f6975
  • golang-go.crypto Debian 14, Debian 13, Debian 12 1:0.0~git20200221.2aa609c-1

debian advisories DEBIAN-CVE-2020-9283

  • openshift-clients openshift 4.3 4.3.31-202007250052.p0.git.3329.59998b9.el7
  • openshift-clients openshift 4.3 4.3.31-202007250052.p0.git.3329.59998b9.el8
  • openshift-clients-redistributable openshift 4.3 4.3.31-202007250052.p0.git.3329.59998b9.el7
  • openshift-clients-redistributable openshift 4.3 4.3.31-202007250052.p0.git.3329.59998b9.el8
  • openshift openshift 4.5 4.5.0-202007012112.p0.git.0.582d7fc.el7
  • openshift openshift 4.5 4.5.0-202007012112.p0.git.0.582d7fc.el8
  • openshift-hyperkube openshift 4.5 4.5.0-202007012112.p0.git.0.582d7fc.el7
  • openshift-hyperkube openshift 4.5 4.5.0-202007012112.p0.git.0.582d7fc.el8

red hat advisories RHBA-2020:3179RHSA-2020:2413RHSA-2020:3369

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-9283 updated cvss 7.5

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

  • Red Hat OpenShift Service Mesh 1 jaeger, jaeger-operator
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 3.11 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +11 more
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 4 openshift4/ose-ptp, openshift4/ose-descheduler, openshift4/ose-service-catalog, openshift4/ose-cluster-capacity, template-service-broker-container, openshift4/ose-descheduler-operator, +6 more Red Hat Openshift Container Storage 4 ocs4/cephcsi-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Virtualization 1 virt-api, multus-cni, virt-handler, virt-launcher, virt-operator, ovs-cni-plugin, +14 more
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat OpenShift Virtualization 2 virt-api, virt-handler, virt-launcher, virt-operator, virt-cdi-cloner, virt-controller, +7 more
    affected: no fix available
  • Red Hat Storage 3 heketi, heketi-client, python-heketi
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Service Mesh 1.0 openshift-service-mesh/3scale-istio-adapter-rhel8 1.0.0-8
    fixed: vendor fix RHSA-2020:3372
  • Red Hat OpenShift Service Mesh 1.1 ior 1.1.6-1.el8, servicemesh 1.1.6-1.el8, servicemesh-cni 1.1.6-1.el8, servicemesh-mixc 1.1.6-1.el8, servicemesh-mixs 1.1.6-1.el8, servicemesh-galley 1.1.6-1.el8, +9 more
    fixed: vendor fix RHSA-2020:3369
show 8 more
  • Red Hat 3Scale AMP 2.10 3scale-amp2/3scale-rhel7-operator 1.13.0-17, 3scale-amp2/apicast-rhel7-operator 1.13.0-4, 3scale-amp2/3scale-rhel7-operator-metadata 3scale2.10.0, 3scale-amp2/apicast-rhel7-operator-metadata 3scale2.10.0
    fixed: vendor fix RHSA-2021:1129
  • Red Hat OpenShift Container Platform 4.3 openshift-clients 4.3.31-202007250052.p0.git.3329.59998b9.el7, openshift-clients 4.3.31-202007250052.p0.git.3329.59998b9.el8, openshift4/ose-azure-machine-controllers v4.3.31-202007272153.p0, openshift4/ose-sriov-dp-admission-controller v4.3.37-202009151447.p0, openshift-clients-redistributable 4.3.31-202007250052.p0.git.3329.59998b9.el7, openshift-clients-redistributable 4.3.31-202007250052.p0.git.3329.59998b9.el8
    fixed: vendor fix RHBA-2020:3179
  • Red Hat OpenShift Container Platform 4.4 openshift4/ose-descheduler v4.4.0-202006290400.p0, openshift4/ose-baremetal-rhel7-operator v4.4.0-202006290400.p0, openshift4/ose-cluster-machine-approver v4.4.0-202007171809.p0, openshift4/ose-azure-machine-controllers v4.4.0-202006290400.p0, openshift4/ose-cloud-credential-operator v4.4.0-202007060343.p0
    fixed: vendor fix RHSA-2020:2790
  • Red Hat OpenShift Container Platform 4.5 openshift4/ose-cli v4.5.0-202007012112.p0, openshift4/ose-pod v4.5.0-202007012112.p0, openshift4/ose-etcd v4.5.0-202007012112.p0, openshift4/ose-tests v4.5.0-202007100518.p0, openshift4/ose-coredns v4.5.0-202007012112.p0, openshift4/ose-grafana v4.5.0-202007012112.p0, +78 more
    fixed: vendor fix RHSA-2020:2413
  • Red Hat OpenShift Container Platform 4.6 openshift4/ose-elasticsearch-operator v4.6.0-202010200139.p0
    fixed: vendor fix RHSA-2020:4298
  • Red Hat OpenShift Jaeger 1.17 distributed-tracing/jaeger-agent-rhel7 1.17.6-1, distributed-tracing/jaeger-query-rhel7 1.17.6-1, distributed-tracing/jaeger-ingester-rhel7 1.17.6-1, distributed-tracing/jaeger-rhel7-operator 1.17.6-1, distributed-tracing/jaeger-collector-rhel7 1.17.6-1, distributed-tracing/jaeger-all-in-one-rhel7 1.17.6-1, +2 more
    fixed: vendor fix RHSA-2020:3370
  • Red Hat OpenShift Service Mesh 1.1 kiali v1.12.10.redhat2-1.el7
    fixed: vendor fix RHSA-2020:3369
  • Red Hat Enterprise Linux 7 gomtree Red Hat OpenShift Container Platform 4 openshift4/ose-sdn-rhel8, openshift4/ose-cluster-policy-controller-rhel8 Red Hat OpenShift Container Platform 4.3 perf 4.18.0-193.13.2.el8_2, kernel 4.18.0-193.13.2.el8_2, bpftool 4.18.0-193.13.2.el8_2, kernel-core 4.18.0-193.13.2.el8_2, redhat-release-coreos 43.82-6.el8, kernel-tools 4.18.0-193.13.2.el8_2, +115 more Red Hat OpenShift Container Platform 4.5 openshift4/ose-console v4.5.0-202007012112.p0, openshift4/ose-hyperkube v4.5.0-202007100518.p0, openshift4/ose-multus-cni v4.5.0-202007012112.p0, openshift4/ose-cluster-capacity v4.5.0-202007012112.p0, openshift4/ose-oauth-server-rhel7 v4.5.0-202007012112.p0, openshift4/ose-cluster-machine-approver v4.5.0-202007012112.p0, +1 more Red Hat OpenShift Container Platform 4.6 openshift4/ose-cli v4.6.0-202010080605.p0, openshift4/ose-ptp v4.6.0-202010200139.p0, openshift4/ose-etcd v4.6.0-202010061132.p0, openshift4/ose-tests v4.6.0-202010120952.p0, openshift4/ose-console v4.6.0-202010100121.p0, openshift4/ose-coredns v4.6.0-202010061132.p0, +79 more Red Hat Openshift Container Storage 4 ocs4/mcg-rhel8-operator, ocs4/ocs-rhel8-operator, ocs4/rook-ceph-rhel8-operator
    +2 more products
    Red Hat OpenShift Virtualization 2 node-maintenance-operator, kubernetes-nmstate-handler, kubevirt-metrics-collector Red Hat Storage 3 grafana
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Published
  2. First public exploit (EDB-48121)

Exploit prediction

21.05% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-48121 Go SSH servers 0.0.2 - Denial of Service (PoC) dos, 2020-02-24
  • packetstormsecurity.com http://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go golang.org/x/crypto
<0.0.0-20200220183623-bac4c82f6975
0.0.0-20200220183623-bac4c82f6975

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.