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CVE-2021-3847

Quick assessment

Affected
n/a kernel
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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于OverlayFS子系统中存在setuid文件执行能力的缺陷。攻击者利用该漏洞升级系统上的权限。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-3847

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount. A local user could use this flaw to escalate their privileges on the system.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
权限预留不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于OverlayFS子系统中存在setuid文件执行能力的缺陷。攻击者利用该漏洞升级系统上的权限。
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
- kernel all versions up to, including, kernel 5.17 -

II. Public POCs for CVE-2021-3847

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III. Intelligence Information for CVE-2021-3847

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Vendor Advisories for CVE-2021-3847 (1)

Mailing List Discussions for CVE-2021-3847 (1)

Same Patch Batch · n/a · 2022-04-01 · 32 CVEs total

CVE-2022-25017 9.1 CRITICAL Hitron Technologies CHITA Router Firmware 操作系统命令注入漏洞
CVE-2022-21235 8.1 HIGH Command Injection
CVE-2022-24440 8.1 HIGH Command Injection
CVE-2022-21223 8.1 HIGH Command Injection
CVE-2022-24066 8.1 HIGH Command Injection
CVE-2022-22950 Vmware Spring Framework 安全漏洞
CVE-2021-20238 Red Hat OpenShift Container Platform 访问控制错误漏洞
CVE-2021-32503 SICK FieldEcho 资源管理错误漏洞
CVE-2021-3461 Red Hat Keycloak代码问题漏洞
CVE-2021-20295 Red Hat Enterprise Linux 缓冲区错误漏洞
CVE-2021-27223 Kaspersky Anti-Virus安全漏洞
CVE-2022-27534 Kaspersky Anti-Virus 安全漏洞
CVE-2022-25155 Mitsubishi Electric MELSEC iQ-F series 授权问题漏洞
CVE-2022-25156 Mitsubishi Electric MELSEC iQ-F series 加密问题漏洞
CVE-2022-25157 Mitsubishi Electric MELSEC iQ-F series 授权问题漏洞
CVE-2022-25159 Mitsubishi Electric MELSEC iQ-F series 安全漏洞
CVE-2022-25158 Mitsubishi Electric MELSEC iQ-F series 安全漏洞
CVE-2022-25160 Mitsubishi Electric Factory Automation 安全漏洞
CVE-2022-22965 Spring Framework 代码注入漏洞
CVE-2019-14839 Business-central 信息泄露漏洞

Showing top 20 of 32 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-281

V. Comments for CVE-2021-3847

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