CVE Vulnerability

CVE-2020-4042

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.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.8 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://github.com/bareos/bareos/security/advisories/GHSA-vqpj-2vhj-h752 Mitigation Third Party Advisory
https://bugs.bareos.org/view.php?id=1250 Vendor Advisory
Configurations

Configuration 1

cpe:2.3:a:bareos:bareos:19.2.8:pre:*:*:*:*:*:*
cpe:2.3:a:bareos:bareos:*:*:*:*:*:*:*:*
Information

Published : 2020-07-10 08:15

Updated : 2020-07-15 05:30

NVD link : CVE-2020-4042

Mitre link : CVE-2020-4042

Products Affected
No products.
CWE
CWE-294

Authentication Bypass by Capture-replay