Tendermint up to 0.33.5 Signature signature verification

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Tendermint up to 0.33.5. It has been classified as problematic. The affected element is an unknown function of the component Signature Handler. This manipulation causes signature verification. This vulnerability appears as CVE-2020-15091. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Tendermint up to 0.33.5 and classified as problematic. Affected by this vulnerability is an unknown code block of the component Signature Handler. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect availability. The summary by CVE is:

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.

The weakness was presented 07/02/2020 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2020-15091 since 06/25/2020. The attack can be launched remotely. The requirement for exploitation is a single authentication. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 0.33.6 eliminates this vulnerability.

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Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Tendermint 0.33.6

Timelineinfo

06/25/2020 🔍
07/02/2020 +7 days 🔍
07/03/2020 +1 days 🔍
10/28/2020 +117 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-15091 (🔍)
GCVE (CVE): GCVE-0-2020-15091
GCVE (VulDB): GCVE-100-157603

Entryinfo

Created: 07/03/2020 07:37
Updated: 10/28/2020 16:43
Changes: 07/03/2020 07:37 (38), 07/03/2020 07:42 (11), 10/28/2020 16:38 (1), 10/28/2020 16:43 (1)
Complete: 🔍
Cache ID: 216::103

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