CVE Vulnerability

CVE-2020-15091

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.

4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/tendermint/tendermint/security/advisories/GHSA-6jqj-f58p-mrw3 Exploit Third Party Advisory
https://github.com/tendermint/tendermint/commit/480b995a31727593f58b361af979054d17d84340 Patch Third Party Advisory
https://github.com/tendermint/tendermint/issues/4926 Exploit Issue Tracking
Configurations

Configuration 1

cpe:2.3:a:tendermint:tendermint:*:*:*:*:*:*:*:*
Information

Published : 2020-07-02 05:15

Updated : 2020-07-08 07:16

NVD link : CVE-2020-15091

Mitre link : CVE-2020-15091

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature