In etcd before versions 3.3.23 and 3.4.10, it is possible to have an entry index greater then the number of entries in the ReadAll method in wal/wal.go. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go down from a runtime panic when reading the entry.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15112
Reference (s):
- https://github.com/etcd-io/etcd/security/advisories/GHSA-m332-53r6-2w93
- URL: https://github.com/etcd-io/etcd/security/advisories/GHSA-m332-53r6-2w93
- FEDORA:FEDORA-2020-cd43b84c16
- URL: https://lists.fedoraproject.org/archives/list/[email protected]/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/