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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26264
Reference (s):
- https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q
- URL: https://github.com/ethereum/go-ethereum/security/advisories/GHSA-r33q-22hv-j29q
- https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46
- URL: https://github.com/ethereum/go-ethereum/commit/bddd103a9f0af27ef533f04e06ea429cf76b6d46
- https://github.com/ethereum/go-ethereum/pull/21896