CVE-2021-28235

Publication date 4 April 2023

Last updated 11 July 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
etcd	25.10 questing	Needs evaluation
	25.04 plucky	Needs evaluation
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Needs evaluation
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Fixed 3.4.23-4ubuntu0.1
	22.10 kinetic	Fixed 3.3.25+dfsg-7ubuntu0.22.10.2
	22.04 LTS jammy	Fixed 3.3.25+dfsg-7ubuntu0.22.04.1+esm1
	20.04 LTS focal	Fixed 3.2.26+dfsg-6ubuntu0.2+esm1
	18.04 LTS bionic	Fixed 3.2.17+dfsg-1ubuntu0.1+esm2
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Ignored end of standard support

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Patch details

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

Package	Patch details
etcd	Upstream: 8b1cd03 Upstream: 3618ab4

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-6189-1
etcd vulnerability
28 June 2023