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CVE-2021-20194

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中存在输入验证错误漏洞，该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.40% · P32
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I. Basic Information for CVE-2021-20194

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 输入验证错误漏洞
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中存在输入验证错误漏洞，该漏洞源于网络系统或产品在内存上执行操作时，未正确验证数据边界，导致向关联的其他内存位置上执行了错误的读写操作。攻击者可利用该漏洞导致缓冲区溢出或堆溢出等。
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 kernel 5.2 and higher. -

II. Public POCs for CVE-2021-20194

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III. Intelligence Information for CVE-2021-20194

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Vendor Advisories for CVE-2021-20194 (2)

Same Patch Batch · n/a · 2021-02-23 · 56 CVEs total

CVE-2020-28429 7.3 HIGH Command Injection
CVE-2020-28587 SoftMaker Office PlanMaker 缓冲区错误漏洞
CVE-2021-26927 JasPer 代码问题漏洞
CVE-2021-3407 artifex mupdf 资源管理错误漏洞
CVE-2021-20182 Red Hat openshift4/ose-docker-builder 安全漏洞
CVE-2021-3405 Matroska libebml 缓冲区错误漏洞
CVE-2021-3410 libcaca 输入验证错误漏洞
CVE-2020-27782 Red Hat Undertow 资源管理错误漏洞
CVE-2020-8297 Nextcloud Deck 安全漏洞
CVE-2021-22882 UniFi Protect 资源管理错误漏洞
CVE-2021-20247 Sourceforge mbsync 路径遍历漏洞
CVE-2020-7120 Aruba ClearPass Policy Manager 安全漏洞
CVE-2021-26677 Aruba ClearPass Policy Manager 安全漏洞
CVE-2021-26679 Aruba ClearPass Policy Manager 命令注入漏洞
CVE-2021-26680 Aruba ClearPass Policy Manager 命令注入漏洞
CVE-2021-27582 MITREid Connect 安全漏洞
CVE-2021-26678 Aruba ClearPass Policy Manager Prior 跨站脚本漏洞
CVE-2021-22651 Luxion KeyShot 路径遍历漏洞
CVE-2021-20198 Red Hat OpenShift Container Platform 访问控制错误漏洞
CVE-2021-26926 JasPer 缓冲区错误漏洞

Showing top 20 of 56 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-20

V. Comments for CVE-2021-20194

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