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.

CVSS v3 6.8 MEDIUM
CVSS v2.0 4.3 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:P/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:bareos:bareos::::::::
	cpe:2.3:a:bareos:bareos:19.2.8:pre::::::

History

21 Nov 2024, 05:32

Type	Values Removed	Values Added
References	~~() https://bugs.bareos.org/view.php?id=1250 - Vendor Advisory~~	() https://bugs.bareos.org/view.php?id=1250 - Vendor Advisory
References	~~() https://github.com/bareos/bareos/security/advisories/GHSA-vqpj-2vhj-h752 - Mitigation, Third Party Advisory~~	() https://github.com/bareos/bareos/security/advisories/GHSA-vqpj-2vhj-h752 - Mitigation, Third Party Advisory

Information

Published : 2020-07-10 20:15

Updated : 2024-11-21 05:32

NVD link : CVE-2020-4042

Mitre link : CVE-2020-4042

CVE.ORG link : CVE-2020-4042

JSON object : View

Products Affected

bareos

bareos

CWE

CWE-294

Authentication Bypass by Capture-replay

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