CVE-2020-4042 MEDIUM

CVE-2020-4042: Authentication bypass in Bareos

Vendor Bareos
Product bareos
Weakness CWE-294
Published July 10, 2020
Last update August 4, 2024

CVSS base score

6.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

What the vulnerability does

01Description

Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without knowledge of the shared secret if the director allows client initiated connection and connects to the client itself. The malicious client can replay the Bareos director's cram-md5 challenge to the director itself leading to the director responding to the replayed challenge. The response obtained is then a valid reply to the directors original challenge. This is fixed in version 19.2.8.

Key dates

02Disclosure timeline

July 10, 2020 CVE published
August 4, 2024 Record updated