CVE-2020-4042

Authentication bypass in Bareos

MEDIUM
6.8
CVSS Score
Published: July 10, 2020 at 07:30 PM UTC
Updated: June 17, 2026 at 03:19 AM UTC
1 product affected across 1 vendorBareos

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Severity
MEDIUM6.8
Exploit prediction
EPSS 1.0%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 19.2.719.2.8 pre
Affected range stops below 19.2.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

CVSS

6.8MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-294

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