CVE-2020-9283

Go SSH servers 0.0.2 - Denial of Service (PoC)

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

golang.org/x/crypto versiones anteriores a v0.0.0-20200220183623-bac4c82f6975, para Go permite un pánico durante la comprobación de firma en el paquete golang.org/x/crypto/ssh. Un cliente puede atacar un servidor SSH que acepte claves públicas. Además, un servidor puede atacar a cualquier cliente SSH.

A denial of service vulnerability was found in the SSH package of the golang.org/x/crypto library. An attacker could exploit this flaw by supplying crafted SSH ed25519 keys to cause a crash in applications that use this package as either an SSH client or server.

Red Hat 3scale API Management delivers centralized API management features through a distributed, cloud-hosted layer. It includes built-in features to help in building a more successful API program, including access control, rate limits, payment gateway integration, and developer experience tools. This advisory is intended to use with container images for Red Hat 3scale API Management 2.10.0.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-19 CVE Reserved
2020-02-20 CVE Published
2020-02-23 First Exploit
2024-08-04 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-130: Improper Handling of Length Parameter Inconsistency
CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (11)

URL	Tag	Source
https://groups.google.com/forum/#%21topic/golang-announce/3L45YRc91SY
https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/11/msg00027.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/11/msg00031.html	Mailing List
https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html	Mailing List

URL	Date	SRC
https://packetstorm.news/files/id/156480	2020-02-23
https://www.exploit-db.com/exploits/48121	2020-02-24
https://github.com/brompwnie/CVE-2020-9283	2020-06-08
http://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2020-9283	2021-04-08
https://bugzilla.redhat.com/show_bug.cgi?id=1804533	2021-04-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Golang Search vendor "Golang"		Package Ssh Search vendor "Golang" for product "Package Ssh"				0.0.0-20200220183623-bac4c82f6975 Search vendor "Golang" for product "Package Ssh" and version "0.0.0-20200220183623-bac4c82f6975"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected