CVE-2020-4042 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score matches with CNA score
CNA:  GitHub, Inc.
Base Score:  6.8 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

References to Advisories, Solutions, and Tools

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Hyperlink 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 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-294 Authentication Bypass by Capture-replay cwe source acceptance level NIST   Contributor acceptance level GitHub, Inc.  

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Change History

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Quick Info

CVE Dictionary Entry:
CVE-2020-4042
NVD Published Date:
07/10/2020
NVD Last Modified:
07/15/2020
Source:
MITRE