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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)
Available with Ubuntu Pro
focal
Released (3.2.26+dfsg-6ubuntu0.1)
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Needed

kinetic Ignored
(end of life, was needed)
lunar Ignored
(end of life, was needed)
mantic Ignored
(end of life, was needed)
noble Needed

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

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