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CVE-2020-8289

Quick assessment

Affected
n/a Backblaze
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Backblaze是美国Backblaze公司的一款云端备份服务。 Backblaze for Windows 7.0.1.433之前版本 and Backblaze for macOS 7.0.1.434之前版本存在信任管理问题漏洞，该漏洞源于 bztransmit helper中遭受不适当的证书验证，这是由于url中字符串的硬编码白名单被禁用，导致可能通过客户端更新功能远程执行代码。

AI Predicted 9.8 Difficulty: Easy EPSS 4.66% · P92
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I. Basic Information for CVE-2020-8289

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Backblaze 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Backblaze是美国Backblaze公司的一款云端备份服务。 Backblaze for Windows 7.0.1.433之前版本 and Backblaze for macOS 7.0.1.434之前版本存在信任管理问题漏洞，该漏洞源于 bztransmit helper中遭受不适当的证书验证，这是由于url中字符串的硬编码白名单被禁用，导致可能通过客户端更新功能远程执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Backblaze Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 -

II. Public POCs for CVE-2020-8289

# POC Description Source Link Shenlong Link
1 CVE-2020-8289 – Remote Code Execution as SYSTEM/root via Backblaze https://github.com/geffner/CVE-2020-8289 POC Details
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III. Intelligence Information for CVE-2020-8289

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Mailing List Discussions for CVE-2020-8289 (2)

Security Blog Posts for CVE-2020-8289 (1)

Other References for CVE-2020-8289 (3)

Same Patch Batch · n/a · 2020-12-27 · 12 CVEs total

CVE-2020-35736 Liftoff GateOne 路径遍历漏洞
CVE-2020-29156 WordPress plugin WooCommerce 权限许可和访问控制问题漏洞
CVE-2020-29250 Cxuucms 跨站脚本漏洞
CVE-2020-29249 Cxuucms 跨站脚本漏洞
CVE-2020-29299 Zyxel ZLD和Zyxel SD-OS 命令注入漏洞
CVE-2020-29204 XXL-JOB 跨站脚本漏洞
CVE-2020-35729 KLog Server 操作系统命令注入漏洞
CVE-2020-35728 FasterXML jackson-databind 代码问题漏洞
CVE-2020-35448 GNU Binutils 缓冲区错误漏洞
CVE-2020-8290 Backblaze 权限许可和访问控制问题漏洞
CVE-2020-35678 Python 输入验证错误漏洞

IV. Related Vulnerabilities

Same product: Backblaze
Same vendor: n/a
Same weakness: CWE-295

V. Comments for CVE-2020-8289

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