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CVE-2021-39193— Transaction validity oversight in pallet-ethereum

Quick assessment

Affected
paritytech frontier
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.

Github Frontier是Substrate 的以太坊兼容层。它允许您运行未经修改的以太坊 dapp。 Frontier 存在输入验证错误漏洞，该漏洞源于程序未验证输入数据大小，"pallet-ethereum"中的一个错误可能会导致无效交易包含在“pallet-ethereum”中的以太坊块状态中。

CVSS 5.3 · Medium EPSS 1.19% · P67

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-39193

Vulnerability Information
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Vulnerability Title
Transaction validity oversight in pallet-ethereum
Source: CVE Program / CVE List V5
Vulnerability Description
Frontier is Substrate's Ethereum compatibility layer. Prior to commit number 0b962f218f0cdd796dadfe26c3f09e68f7861b26, a bug in `pallet-ethereum` can cause invalid transactions to be included in the Ethereum block state in `pallet-ethereum` due to not validating the input data size. Any invalid transactions included this way have no possibility to alter the internal Ethereum or Substrate state. The transaction will appear to have be included, but is of no effect as it is rejected by the EVM engine. The impact is further limited by Substrate extrinsic size constraints. A patch is available in commit number 0b962f218f0cdd796dadfe26c3f09e68f7861b26. There are no workarounds aside from applying the patch.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Github Frontier 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Github Frontier是Substrate 的以太坊兼容层。它允许您运行未经修改的以太坊 dapp。 Frontier 存在输入验证错误漏洞，该漏洞源于程序未验证输入数据大小，"pallet-ethereum"中的一个错误可能会导致无效交易包含在“pallet-ethereum”中的以太坊块状态中。
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
paritytech frontier < 0b962f218f0cdd796dadfe26c3f09e68f7861b26 -

II. Public POCs for CVE-2021-39193

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III. Intelligence Information for CVE-2021-39193

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Patches & Fixes for CVE-2021-39193 (2)

IV. Related Vulnerabilities

Same product: frontier
Same vendor: paritytech
Same weakness: CWE-20

V. Comments for CVE-2021-39193

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