CVE-2020-26264

moderate-risk
Published 2020-12-11

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.

Do I need to act?

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0.49% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Ethereum

References (8)

Patch https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf...
Patch https://github.com/ethereum/go-ethereum/pull/21896
Third Party Advisory https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25
Third Party Advisory https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q
Patch https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf...
Patch https://github.com/ethereum/go-ethereum/pull/21896
Third Party Advisory https://github.com/ethereum/go-ethereum/releases/tag/v1.9.25
Third Party Advisory https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q
31
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 2/34 · Minimal
Exposure 5/34 · Minimal