CVE-2020-26264

LES Server DoS via GetProofsV2

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.52%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: ethereum go-ethereum
Published at:
Updated at:

References

Link Tags
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q third party advisory
https://github.com/ethereum/go-ethereum/pull/21896 third party advisory patch
https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46 third party advisory patch
https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25 third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-26264?
CVE-2020-26264 has been scored as a medium severity vulnerability.
How to fix CVE-2020-26264?
To fix CVE-2020-26264, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-26264 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-26264 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-26264?
CVE-2020-26264 affects ethereum go-ethereum.
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