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CVE-2020-15091— Denial of Service in TenderMint

Quick assessment

Affected
tendermint tendermint
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tendermint是美国Tendermint公司的一款Byzantine Fault Tolerant (BFT) 式中间件。 Tendermint v0.33.0及之后版本（已在v0.33.6版本中修复）中存在数据伪造问题漏洞。该漏洞源于网络系统或产品未充分验证数据的来源或真实性。攻击者可利用伪造的数据进行攻击。

CVSS 6.5 · Medium EPSS 0.91% · P59
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I. Basic Information for CVE-2020-15091

Vulnerability Information
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Vulnerability Title
Denial of Service in TenderMint
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Tendermint 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tendermint是美国Tendermint公司的一款Byzantine Fault Tolerant (BFT) 式中间件。 Tendermint v0.33.0及之后版本（已在v0.33.6版本中修复）中存在数据伪造问题漏洞。该漏洞源于网络系统或产品未充分验证数据的来源或真实性。攻击者可利用伪造的数据进行攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tendermint tendermint >= 0.33.0, < 0.33.6 -

II. Public POCs for CVE-2020-15091

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III. Intelligence Information for CVE-2020-15091

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Patches & Fixes for CVE-2020-15091 (1)

Vendor Advisories for CVE-2020-15091 (1)

IV. Related Vulnerabilities

Same product: tendermint
Same vendor: tendermint
Same weakness: CWE-347

V. Comments for CVE-2020-15091

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