gsd-2020-26241
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth's pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-26241",
"description": "Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth\u0027s pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17.",
"id": "GSD-2020-26241"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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],
"details": "Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth\u0027s pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17.",
"id": "GSD-2020-26241",
"modified": "2023-12-13T01:22:08.709513Z",
"schema_version": "1.4.0"
}
},
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"ID": "CVE-2020-26241",
"STATE": "PUBLIC",
"TITLE": "Shallow copy bug in geth"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
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"value": "Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth\u0027s pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
}
},
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"description": [
{
"lang": "eng",
"value": "CWE-682: Incorrect Calculation"
}
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}
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},
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"name": "https://blog.ethereum.org/2020/11/12/geth_security_release/",
"refsource": "MISC",
"url": "https://blog.ethereum.org/2020/11/12/geth_security_release/"
},
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"discovery": "UNKNOWN"
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"affected_range": "\u003cv1.9.17",
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"cwe_ids": [
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"CWE-682",
"CWE-937"
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"date": "2020-12-03",
"description": "Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth\u0027s pre-compiled dataCopy (at `0x00..0x04`) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls `0x00..0x04` with R as an argument, then overwrites R to Y, and finally invokes the `RETURNDATACOPY` opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed ",
"fixed_versions": [
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],
"identifier": "CVE-2020-26241",
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"GHSA-69v6-xc2j-r2jf"
],
"not_impacted": "All versions starting from 1.9.17",
"package_slug": "go/github.com/ethereum/go-ethereum",
"pubdate": "2020-11-25",
"solution": "Upgrade to version 1.9.17 or above.",
"title": "Incorrect Calculation",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2020-26241",
"https://blog.ethereum.org/2020/11/12/geth_security_release/"
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"uuid": "7e6f1574-e262-43e0-ba6e-b08c571f0b16",
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"tags": [
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"timestamp": "20200720125642"
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"CWE-682",
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"date": "2020-12-03",
"description": "Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth\u0027s pre-compiled dataCopy (at `0x00..0x04`) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls `0x00..0x04` with R as an argument, then overwrites R to Y, and finally invokes the `RETURNDATACOPY` opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed ",
"fixed_versions": [
"v1.9.17"
],
"identifier": "CVE-2020-26241",
"identifiers": [
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"GHSA-69v6-xc2j-r2jf"
],
"not_impacted": "All versions starting from 1.9.17",
"package_slug": "go/github.com/ethereum/go-ethereum/cmd/evm",
"pubdate": "2020-11-25",
"solution": "Upgrade to version 1.9.17 or above.",
"title": "Incorrect Calculation",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2020-26241",
"https://blog.ethereum.org/2020/11/12/geth_security_release/"
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"tags": [
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"timestamp": "20200720125642"
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"number": "v1.9.17"
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{
"affected_range": "\u003c1.19.7",
"affected_versions": "All versions before 1.19.7",
"cvss_v2": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L",
"cwe_ids": [
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"date": "2021-06-29",
"description": "Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth\u0027s pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17.",
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],
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"CVE-2020-26241"
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"package_slug": "go/github.com/ethereum/go-ethereum/core/vm",
"pubdate": "2021-06-29",
"solution": "Upgrade to version 1.19.7 or above.",
"title": "Incorrect Calculation",
"urls": [
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],
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"package_slug": "go/github.com/ethereum/go-ethereum/eth",
"pubdate": "2020-11-25",
"solution": "Upgrade to version 1.9.17 or above.",
"title": "Incorrect Calculation",
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"https://nvd.nist.gov/vuln/detail/CVE-2020-26241",
"https://blog.ethereum.org/2020/11/12/geth_security_release/"
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"impact": {
"baseMetricV2": {
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"cvssV2": {
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"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.5,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
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"exploitabilityScore": 8.0,
"impactScore": 4.9,
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"scope": "UNCHANGED",
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}
},
"lastModifiedDate": "2020-12-03T15:48Z",
"publishedDate": "2020-11-25T02:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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