Backblaze bztransmit Helper certificate validation

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k0.00

A vulnerability classified as critical has been found in Backblaze (the affected version unknown). This affects some unknown processing of the component bztransmit Helper. The manipulation with an unknown input leads to a weak authentication vulnerability. CWE is classifying the issue as CWE-295. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 12/27/2020. This vulnerability is uniquely identified as CVE-2020-8289. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but an exploit is available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

It is declared as proof-of-concept. The exploit is shared for download at hackerone.com.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at backblaze.com.

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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Weak authentication
CWE: CWE-295
ATT&CK: T1587.003

Local: No
Remote: Yes

Availability: 🔒
Status: Proof-of-Concept
Download: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: backblaze.com

Timelineinfoedit

12/27/2020 Advisory disclosed
12/27/2020 +0 days VulDB entry created
12/27/2020 +0 days VulDB last update

Sourcesinfoedit

Status: Confirmed
Confirmation: 🔒

CVE: CVE-2020-8289 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfoedit

Created: 12/27/2020 10:09 AM
Changes: (3) vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_tempscore
Complete: 🔍

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