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CVE-2021-26562

Quick assessment

Affected
Synology Synology DiskStation Manager (DSM)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Synology DiskStation Manager（DSM）是中国台湾群晖科技（Synology）公司的一套用于网络储存服务器（NAS）上的操作系统。该操作系统可管理资料、文件、照片、音乐等信息。 Synology DiskStation Manager before 6.2.3-25426-3 存在缓冲区错误漏洞，该漏洞允许中间人攻击者通过syno finder站点HTTP报头执行任意代码。

CVSS 9.0 · Critical EPSS 1.90% · P79

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-26562

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds write vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary code via syno_finder_site HTTP header.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Synology DiskStation Manager 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Synology DiskStation Manager（DSM）是中国台湾群晖科技（Synology）公司的一套用于网络储存服务器（NAS）上的操作系统。该操作系统可管理资料、文件、照片、音乐等信息。 Synology DiskStation Manager before 6.2.3-25426-3 存在缓冲区错误漏洞，该漏洞允许中间人攻击者通过syno finder站点HTTP报头执行任意代码。
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
Synology Synology DiskStation Manager (DSM) unspecified ~ 6.2.3-25426-3 -

II. Public POCs for CVE-2021-26562

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III. Intelligence Information for CVE-2021-26562

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Other References for CVE-2021-26562 (2)

Same Patch Batch · Synology · 2021-02-26 · 7 CVEs total

CVE-2021-26561 9.0 CRITICAL Synology DiskStation Manager 缓冲区错误漏洞
CVE-2021-26560 9.0 CRITICAL Synology DiskStation Manager 安全漏洞
CVE-2021-26566 8.3 HIGH Synology DiskStation Manager 信息泄露漏洞
CVE-2021-26564 8.3 HIGH Synology DiskStation Manager 安全漏洞
CVE-2021-26565 8.3 HIGH Synology DiskStation Manager 安全漏洞
CVE-2021-26563 8.2 HIGH Synology DiskStation Manager 访问控制错误漏洞

IV. Related Vulnerabilities

Same product: Synology DiskStation Manager (DSM)
Same vendor: Synology
Same weakness: CWE-787

V. Comments for CVE-2021-26562

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