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CVE-2021-36286

Quick assessment

Affected
Dell SupportAssist Client Consumer
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.

Dell SupportAssist Client是美国戴尔（Dell）公司的一款客户端应用程序。该程序提供自动化、主动和预测性技术进行故障排除等。 Dell SupportAssist Client Consumer 中存在后置链接漏洞，该漏洞源于产品允许任何用户在任何目录下创建符号链接。攻击者可通过该漏洞与NTFS junction point结合升级特权并任意删除文件。 以下产品及版本受到影响：Dell SupportAssist Client Consumer 3.9.13.0 版本及之前版本。

CVSS 7.1 · High EPSS 0.26% · P18
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I. Basic Information for CVE-2021-36286

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Dell SupportAssist Client Consumer versions 3.9.13.0 and any versions prior to 3.9.13.0 contain an arbitrary file deletion vulnerability that can be exploited by using the Windows feature of NTFS called Symbolic links. Symbolic links can be created by any(non-privileged) user under some object directories, but by themselves are not sufficient to successfully escalate privileges. However, combining them with a different object, such as the NTFS junction point allows for the exploitation. Support assist clean files functionality do not distinguish junction points from the physical folder and proceeds to clean the target of the junction that allows nonprivileged users to create junction points and delete arbitrary files on the system which can be accessed only by the admin.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Dell SupportAssist Client 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dell SupportAssist Client是美国戴尔（Dell）公司的一款客户端应用程序。该程序提供自动化、主动和预测性技术进行故障排除等。 Dell SupportAssist Client Consumer 中存在后置链接漏洞，该漏洞源于产品允许任何用户在任何目录下创建符号链接。攻击者可通过该漏洞与NTFS junction point结合升级特权并任意删除文件。 以下产品及版本受到影响：Dell SupportAssist Client Consumer 3.9.13.0 版本及之前版本。
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
Dell SupportAssist Client Consumer unspecified ~ 3.9.13.0 -

II. Public POCs for CVE-2021-36286

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III. Intelligence Information for CVE-2021-36286

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Other References for CVE-2021-36286 (1)

Same Patch Batch · Dell · 2021-09-28 · 8 CVEs total

CVE-2021-21522 8.2 HIGH Dell BIOS 信任管理问题漏洞
CVE-2021-36297 7.8 HIGH SupportAssist Client 代码问题漏洞
CVE-2021-36283 7.5 HIGH Dell BIOS 输入验证错误漏洞
CVE-2021-21570 6.8 MEDIUM Dell NetWorker 操作系统命令注入漏洞
CVE-2021-21569 6.8 MEDIUM Dell NetWorker 路径遍历漏洞
CVE-2021-36285 5.7 MEDIUM Dell BIOS 安全漏洞
CVE-2021-36284 5.7 MEDIUM Dell BIOS 安全漏洞

IV. Related Vulnerabilities

Same product: SupportAssist Client Consumer
Same vendor: Dell
Same weakness: CWE-22

V. Comments for CVE-2021-36286

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