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CVE-2021-3864

Quick assessment

Affected
n/a kernel
Exploitation
Public or AI PoC available; prioritize validation
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，该漏洞源于当某些 SUID 二进制文件执行其后代时，在处理可转储标志设置的方式中发现了一个缺陷。先决条件是 SUID 二进制文件，它将实际 UID 设置为有效 UID，将实际 GID 设置为等于有效 GID。然后，子体的可转储值将设置为 1。因此，如果后代进程崩溃，并且core_pattern设置为相对值，则其核心转储将存储在具有 uid：gid 权限的当前目录中。具有符合条件的根

AI Predicted 4.7 Difficulty: Hard EPSS 0.77% · P53
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I. Basic Information for CVE-2021-3864

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants. The prerequisite is a SUID binary that sets real UID equal to effective UID, and real GID equal to effective GID. The descendant will then have a dumpable value set to 1. As a result, if the descendant process crashes and core_pattern is set to a relative value, its core dump is stored in the current directory with uid:gid permissions. An unprivileged local user with eligible root SUID binary could use this flaw to place core dumps into root-owned directories, potentially resulting in escalation of privileges.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 访问控制错误漏洞
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存在安全漏洞，该漏洞源于当某些 SUID 二进制文件执行其后代时，在处理可转储标志设置的方式中发现了一个缺陷。先决条件是 SUID 二进制文件，它将实际 UID 设置为有效 UID，将实际 GID 设置为等于有效 GID。然后，子体的可转储值将设置为 1。因此，如果后代进程崩溃，并且core_pattern设置为相对值，则其核心转储将存储在具有 uid：gid 权限的当前目录中。具有符合条件的根
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 Not Known -

II. Public POCs for CVE-2021-3864

# POC Description Source Link Shenlong Link
1 Test for cve-2021-3864 https://github.com/walac/cve-2021-3864 POC Details
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III. Intelligence Information for CVE-2021-3864

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Vendor Advisories for CVE-2021-3864 (2)

Mailing List Discussions for CVE-2021-3864 (1)

Other References for CVE-2021-3864 (3)

Same Patch Batch · n/a · 2022-08-26 · 53 CVEs total

CVE-2021-4216 Artifex Software MuPDF 数字错误漏洞
CVE-2022-36548 Edoc-doctor-appointment-system 跨站脚本漏洞
CVE-2022-36547 Edoc-doctor-appointment-system 跨站脚本漏洞
CVE-2022-36542 Edoc-doctor-appointment-system 安全漏洞
CVE-2022-36545 Edoc-doctor-appointment-system SQL注入漏洞
CVE-2022-36544 Edoc-doctor-appointment-system SQL注入漏洞
CVE-2022-36543 Edoc-doctor-appointment-system SQL注入漏洞
CVE-2022-36546 Edoc-doctor-appointment-system 跨站请求伪造漏洞
CVE-2022-0084 Red Hat Data Grid 安全漏洞
CVE-2022-25625 Broadcom Symantec Privileged Access Management 安全漏洞
CVE-2022-0168 Linux kernel 代码问题漏洞
CVE-2021-3414 Red Hat Satellite 安全漏洞
CVE-2021-3632 Red Hat Single Sign-On 授权问题漏洞
CVE-2021-3585 openstack-tripleo-heat-templates 安全漏洞
CVE-2021-3563 Red Hat OpenStack Platform 安全漏洞
CVE-2021-3754 Red Hat Keycloak 安全漏洞
CVE-2021-3735 QEMU 安全漏洞
CVE-2021-3703 Red Hat OpenShift 安全漏洞
CVE-2021-3688 Red Hat JBoss Core Services 信息泄露漏洞
CVE-2021-3669 Linux kernel资源管理错误漏洞

Showing top 20 of 53 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-284

V. Comments for CVE-2021-3864

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