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HackeroneCVE-2020-8290

HistoryDec 27, 2020 - 2:15 a.m.

CVE-2020-8290

2020-12-2702:15:14

CWE-269

hackerone

web.nvd.nist.gov

111

backblaze

windows

macos

cve-2020-8290

privilege management

security vulnerability

nvd

CVSS2

4.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

Percentile

5.1%

JSON

Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in bztransmit helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.

Affected configurations

Nvd

Vulners

Node

backblazebackblazeRange<7.0.0.439macos

backblazebackblazeRange<7.0.0.439windows

VendorProductVersionCPE
backblazebackblaze*cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:*
backblazebackblaze*cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:*

Vendor	Product	Version	CPE
backblaze	backblaze	*	cpe:2.3:a:backblaze:backblaze::::::macos::*
backblaze	backblaze	*	cpe:2.3:a:backblaze:backblaze::::::windows::*

CNA Affected

[
  {
    "product": "Backblaze",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Prior to 7.0.0.439"
      }
    ]
  }
]

References

github.com/geffner/CVE-2020-8290/blob/master/README.md

hackerone.com/reports/818857

youtu.be/OpC6neWd2aM

Social References

CVSS2

4.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

Percentile

5.1%

JSON

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