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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | golang-go.crypto | 1:0.0~git20200221.2aa609c-1 | — |
| Debian 13 | golang-go.crypto | 1:0.0~git20200221.2aa609c-1 | — |
| Debian 12 | golang-go.crypto | 1:0.0~git20200221.2aa609c-1 | — |
| Debian 10 | golang-go.crypto | 1:0.0~git20181203.505ab14-1+deb10u1 | DLA-3455-1 |
| Debian 9 | golang-go.crypto | 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1+deb8u1 | DLA-2402-1 |
| Debian 9 | packer | 0.10.2+dfsg-6+deb9u1 | DLA-2455-1 |
| Debian 9 | restic | 0.3.3-1+deb9u1 | DLA-2453-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mongo-tools | No fix yet | — |
| Ubuntu 18.04 LTS | mongo-tools | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | golang-go.crypto | No fix yet | — |
| Ubuntu Pro 16.04 LTS | golang-go.crypto | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Service Mesh 1 | ior +10 | 1.1.6-1.el8 | RHSA-2020:3369 |
| Red Hat Service Mesh 1 | kiali | v1.12.10.redhat2-1.el7 | RHSA-2020:3369 |
| Red Hat Service Mesh 1 | servicemesh-grafana +1 | 6.4.3-13.el8 | RHSA-2020:3369 |
| Red Hat Service Mesh 1 | servicemesh-operator | 1.1.6-2.el8 | RHSA-2020:3369 |
| Red Hat Service Mesh 1 | servicemesh-prometheus | 2.14.0-14.el8 | RHSA-2020:3369 |
| Red Hat OpenShift 4 | machine-config-daemon | 4.5.0-202007012112.p0.git.2527.d12c3da.el8 | RHSA-2020:2413 |
| Red Hat OpenShift 4 | openshift +1 | 4.5.0-202007012112.p0.git.0.582d7fc.el7 | RHSA-2020:2413 |
| Red Hat OpenShift 4 | openshift-clients +1 | 4.3.31-202007250052.p0.git.3329.59998b9.el7 | RHBA-2020:3179 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | k3d +2 | 5.6.0-r11 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Go SSH servers 0.0.2 - Denial of Service (PoC) EDB-48121 · dos · Feb 24, 2020
GitHub 1 repository
-
brompwnie/CVE-2020-9283 ★ 6 · Jun 2, 2020
Exploit for CVE-2020-9283 based on Go
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | golang.org/x/crypto | < 0.0.0-20200220183623-bac4c82f6975 | 0.0.0-20200220183623-bac4c82f6975 | GHSA-ffhg-7mh4-33c4 |
Advisories 9
- RHSA-2020:3369 Red Hat Security Advisory: Red Hat OpenShift Service Mesh security update Red Hat Security Advisories (RHSA) · Oct 19, 2026
- RHSA-2020:2413 Red Hat Security Advisory: OpenShift Container Platform 4.5 package security update Red Hat Security Advisories (RHSA) · Oct 19, 2026
- RHBA-2020:3179 Red Hat Bug Fix Advisory: OpenShift Container Platform 4.3.31 packages update Red Hat Security Advisories (RHSA) · Oct 19, 2026
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- WID-SEC-2022-0510 IBM DB2: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 18, 2026
- DLA-3455-1 golang-go.crypto - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2402-1 golang-go.crypto - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2455-1 packer - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2453-1 restic - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://groups.google.com/forum/#%21topic/golang-announce/3L45YRc91SY
- http://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html
- [debian-lts-announce] 20201007 [SECURITY] [DLA 2402-1] golang-go.crypto security update mailing-list
- [debian-lts-announce] 20201116 [SECURITY] [DLA 2453-1] restic security update mailing-list
- [debian-lts-announce] 20201118 [SECURITY] [DLA 2455-1] packer security update mailing-list
- [debian-lts-announce] 20230616 [SECURITY] [DLA 3455-1] golang-go.crypto security update mailing-list