VDB-224897 · CVE-2021-28235 · EUVD-2023-1310

Etcd-io 3.4.10 Debug improper authentication

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Etcd-io 3.4.10. This affects an unknown part of the component Debug Handler. The manipulation leads to improper authentication. This vulnerability is uniquely identified as CVE-2021-28235. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Etcd-io 3.4.10 and classified as critical. This issue affects an unknown functionality of the component Debug Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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

The weakness was disclosed 04/04/2023. The identification of this vulnerability is CVE-2021-28235 since 03/12/2021. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 209193 (openSUSE 15 Security Update : etcd (SUSE-SU-2024:3656-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (209193) and EUVD (EUVD-2023-1310). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Etcd-io

Version

3.4.10

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 209193
Nessus Name: openSUSE 15 Security Update : etcd (SUSE-SU-2024:3656-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

03/12/2021 🔍
04/04/2023 +752 days 🔍
04/04/2023 +0 days 🔍
07/12/2025 +830 days 🔍

Sourcesinfo

Advisory: etcd.com
Status: Confirmed

CVE: CVE-2021-28235 (🔍)
GCVE (CVE): GCVE-0-2021-28235
GCVE (VulDB): GCVE-100-224897
EUVD: 🔍

Entryinfo

Created: 04/04/2023 18:18
Updated: 07/12/2025 22:23
Changes: 04/04/2023 18:18 (36), 04/22/2023 08:54 (2), 10/17/2024 18:39 (19), 02/14/2025 19:58 (15), 07/12/2025 22:23 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.