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CVE-2020-26264

MEDIUM
Published 2020-12-11T16:45:24
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CVSS Score

V3.1
6.5
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.005
probability
of exploitation in the wild

There is a 0.5% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.658
Higher than 65.8% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Description

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

ethereum

go-ethereum

Affected Versions:

< 1.9.25

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Denial of service in github.com/ethereum/go-ethereum

GHSA-r33q-22hv-j29q

Advisory Details

### Impact A DoS vulnerability can make a LES server crash via malicious `GetProofsV2` request from a connected LES client. ### Patches The vulnerability was patched in https://github.com/ethereum/go-ethereum/pull/21896. ### Workarounds This vulnerability only concerns users explicitly enabling `les` server; disabling `les` prevents the exploit. It can also be patched by manually applying the patch in https://github.com/ethereum/go-ethereum/pull/21896. ### For more information If you have any questions or comments about this advisory: * Open an issue in [go-ethereum](https://github.com/ethereum/go-ethereum) * Email us at [[email protected]](mailto:[email protected])

Affected Packages

Go github.com/ethereum/go-ethereum
ECOSYSTEM: ≥0 <1.9.25

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

WEB https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-26264
WEB https://github.com/ethereum/go-ethereum/pull/21896
WEB https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46
PACKAGE https://github.com/ethereum/go-ethereum
WEB https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25
WEB https://pkg.go.dev/vuln/GO-2021-0063

Advisory provided by GitHub Security Advisory Database. Published: June 29, 2021, Modified: February 9, 2023

References

https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q
https://github.com/ethereum/go-ethereum/pull/21896
https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46
https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25
Published: 2020-12-11T16:45:24
Last Modified: 2024-08-04T15:56:04.248Z
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