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CVE-2021-42378

Quick assessment

Affected
busybox busybox
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.

BusyBox是乌克兰Denis Vlasenko个人开发者的一套包含了多个linux命令和工具的应用程序。 Busybox的awk applet存在资源管理错误漏洞，攻击者可利用该漏洞在getvar_i函数中处理特制的awk模式时执行代码。

AI Predicted 8.1 Difficulty: Moderate EPSS 2.73% · P86

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-42378

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
BusyBox 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BusyBox是乌克兰Denis Vlasenko个人开发者的一套包含了多个linux命令和工具的应用程序。 Busybox的awk applet存在资源管理错误漏洞，攻击者可利用该漏洞在getvar_i函数中处理特制的awk模式时执行代码。
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
busybox busybox unspecified ~ 1.34.0 -

II. Public POCs for CVE-2021-42378

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-42378

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Vendor Advisories for CVE-2021-42378 (1)

Mailing List Discussions for CVE-2021-42378 (1)

Security Blog Posts for CVE-2021-42378 (1)

Other References for CVE-2021-42378 (1)

Same Patch Batch · busybox · 2021-11-15 · 14 CVEs total

CVE-2021-42386 BusyBox 资源管理错误漏洞
CVE-2021-42385 BusyBox 资源管理错误漏洞
CVE-2021-42384 BusyBox 资源管理错误漏洞
CVE-2021-42383 BusyBox 资源管理错误漏洞
CVE-2021-42382 BusyBox 资源管理错误漏洞
CVE-2021-42381 BusyBox 资源管理错误漏洞
CVE-2021-42380 BusyBox 资源管理错误漏洞
CVE-2021-42379 BusyBox 资源管理错误漏洞
CVE-2021-42377 Busybox 安全漏洞
CVE-2021-42376 BusyBox 代码问题漏洞
CVE-2021-42375 BusyBox 安全漏洞
CVE-2021-42374 BusyBox 缓冲区错误漏洞
CVE-2021-42373 BusyBox 代码问题漏洞

IV. Related Vulnerabilities

Same product: busybox
Same vendor: busybox
Same weakness: CWE-416

V. Comments for CVE-2021-42378

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