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cveGitHub_MCVE-2020-4042
HistoryJul 10, 2020 - 8:15 p.m.

CVE-2020-4042

2020-07-1020:15:11
CWE-294
GitHub_M
web.nvd.nist.gov
72
bareos
cve-2020-4042
security vulnerability
malicious client
shared secret
director

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

6.8

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.3

Confidence

High

EPSS

0.001

Percentile

38.7%

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 configurations

Nvd
Vulners
Node
bareosbareosRange19.2.7
OR
bareosbareosMatch19.2.8pre
VendorProductVersionCPE
bareosbareos*cpe:2.3:a:bareos:bareos:*:*:*:*:*:*:*:*
bareosbareos19.2.8cpe:2.3:a:bareos:bareos:19.2.8:pre:*:*:*:*:*:*

CNA Affected

[
  {
    "product": "bareos",
    "vendor": "bareos",
    "versions": [
      {
        "status": "affected",
        "version": "< 19.2.8"
      }
    ]
  }
]

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

6.8

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

6.3

Confidence

High

EPSS

0.001

Percentile

38.7%