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CVE-2020-15106

Published: 5 August 2020

In etcd before versions 3.3.23 and 3.4.10, a large slice causes panic in decodeRecord method. The size of a record is stored in the length field of a WAL file and no additional validation is done on this data. Therefore, it is possible to forge an extremely large frame size that can unintentionally panic at the expense of any RAFT participant trying to decode the WAL.

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