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CVE-2020-15112

Published: 5 August 2020

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.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
etcd
Launchpad, Ubuntu, Debian
bionic
Released (3.2.17+dfsg-1ubuntu0.1+esm1)
focal
Released (3.2.26+dfsg-6ubuntu0.1)
groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needed

kinetic Needed

precise Does not exist

trusty Does not exist

upstream
Released (3.3.23, 3.4.10)
xenial Needed

Patches:
upstream: https://github.com/etcd-io/etcd/pull/12638/commits/b14255c0b4d1a27221d1857ae0e72bcac7f2b146 (3.3.23)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H