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

Moderate severity GitHub Reviewed Published Dec 11, 2020 in ethereum/go-ethereum • Updated Feb 14, 2023

Package

gomod github.com/ethereum/go-ethereum (Go)

Affected versions

< 1.9.25

Patched versions

1.9.25

Description

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 ethereum/go-ethereum#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 ethereum/go-ethereum#21896.

For more information

If you have any questions or comments about this advisory:

References

@fjl fjl published to ethereum/go-ethereum Dec 11, 2020
Reviewed May 21, 2021
Published to the GitHub Advisory Database Jun 29, 2021
Last updated Feb 14, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.164%
(54th percentile)

Weaknesses

CVE ID

CVE-2020-26264

GHSA ID

GHSA-r33q-22hv-j29q

Source code

Credits

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