CVE-2020-15091

Denial of Service in TenderMint

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

TenderMint from version 0.33.0 and before version 0.33.6 allows block proposers to include signatures for the wrong block. This may happen naturally if you start a network, have it run for some time and restart it (**without changing chainID**). A malicious block proposer (even with a minimal amount of stake) can use this vulnerability to completely halt the network. This issue is fixed in Tendermint 0.33.6 which checks all the signatures are for the block with 2/3+ majority before creating a commit.

TenderMint desde versión 0.33.0 y anteriores a versión 0.33.6, permite a proponentes de bloque incluir firmas para el bloque equivocado. Esto puede suceder naturalmente si inicia una red, la hace funcionar durante un tiempo y la reinicia (**without changing chainID**). Un proponente de bloque malicioso (inclusive con una cantidad mínima de participación) puede usar esta vulnerabilidad para detener completamente la red. Este problema es corregido en Tendermint versión 0.33.6, que comprueba que todas las firmas son para el bloque con una mayoría de 2/3+ antes de crear una confirmación

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-06-25 CVE Reserved
2020-07-02 CVE Published
2024-03-19 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/tendermint/tendermint/issues/4926	2024-08-04
https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3	2024-08-04

URL	Date	SRC
https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340	2020-07-08

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Tendermint Search vendor "Tendermint"		Tendermint Search vendor "Tendermint" for product "Tendermint"				>= 0.33.0 < 0.33.6 Search vendor "Tendermint" for product "Tendermint" and version " >= 0.33.0 < 0.33.6"		-		Affected