CVE-2020-29652

Publication date 17 December 2020

Last updated 11 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

A nil pointer dereference in the golang.org/x/crypto/ssh component through v0.0.0-20201203163018-be400aefbc4c for Go allows remote attackers to cause a denial of service against SSH servers.

Read the notes from the security team

Status

Package Ubuntu Release Status
golang-go.crypto 25.10 questing
Fixed 1:0.0~git20201221.eec23a3-1
25.04 plucky
Fixed 1:0.0~git20201221.eec23a3-1
24.10 oracular
Fixed 1:0.0~git20201221.eec23a3-1
24.04 LTS noble
Fixed 1:0.0~git20201221.eec23a3-1
23.10 mantic
Fixed 1:0.0~git20201221.eec23a3-1
23.04 lunar
Fixed 1:0.0~git20201221.eec23a3-1
22.10 kinetic
Fixed 1:0.0~git20201221.eec23a3-1
22.04 LTS jammy
Fixed 1:0.0~git20201221.eec23a3-1
21.10 impish
Fixed 1:0.0~git20201221.eec23a3-1
21.04 hirsute
Fixed 1:0.0~git20201221.eec23a3-1
20.10 groovy Ignored end of life
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
kubernetes 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Ignored end of life, was needs-triage
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Not affected
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Not affected
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
snapd 25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
lxd 21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

Notes

jdstrand

snapd contains an embedded copy of golang-go.crypto lxd in 18.04 LTS and earlier contains an embedded copy of golang-go.crypto

mdeslaur

snapd and lxd only use the terminal sub-package, not the ssh part of golang-go.crypto, so they are not vulnerable

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
golang-go.crypto

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Other references