CVE-2021-3864
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I. Basic Information for CVE-2021-3864
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
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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- https://www.openwall.com/lists/oss-security/2021/10/20/2x_refsource_MISC
- https://lore.kernel.org/all/20211226150310.GA992%401wt.eu/x_refsource_MISC
- CVE-2021-3864 - Red Hat Customer Portalx_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=2015046x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-3864
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
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Information Leakage in kernel
Same vendor: n/a
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Same weakness: CWE-284
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Langfuse: Improper role-based-access control in Langfuse LLM - CVE-2026-42278
UltraDAG: Smart Account Spending Policy Bypass via Pockets
V. Comments for CVE-2021-3864
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