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CVE-2021-3997

Quick assessment

Affected
n/a systemd
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.

systemd是德国Lennart Poettering个人开发者的一款基于Linux的系统和服务管理器。该产品兼容了SysV和LSB的启动脚本，且提供了一个用来表示系统服务间依赖关系的框架。 systemd 存在安全漏洞，该漏洞是由于systemd-tmpfiles中不受控制的递归而存在的。本地用户可以在tmp文件夹中创建多个嵌套目录，case systemd会在系统启动时崩溃。该漏洞允许本地用户执行拒绝服务(DoS)攻击。

AI Predicted 5.5 Difficulty: Hard EPSS 1.56% · P73

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-3997

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
systemd 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
systemd是德国Lennart Poettering个人开发者的一款基于Linux的系统和服务管理器。该产品兼容了SysV和LSB的启动脚本，且提供了一个用来表示系统服务间依赖关系的框架。 systemd 存在安全漏洞，该漏洞是由于systemd-tmpfiles中不受控制的递归而存在的。本地用户可以在tmp文件夹中创建多个嵌套目录，case systemd会在系统启动时崩溃。该漏洞允许本地用户执行拒绝服务(DoS)攻击。
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
- systemd Fixed in v251-rc1 -

II. Public POCs for CVE-2021-3997

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-3997

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Patches & Fixes for CVE-2021-3997 (1)

Vendor Advisories for CVE-2021-3997 (3)

Mailing List Discussions for CVE-2021-3997 (1)

Same Patch Batch · n/a · 2022-08-23 · 54 CVEs total

CVE-2022-24381 7.5 HIGH Denial of Service (DoS)
CVE-2022-25888 7.5 HIGH Denial of Service (DoS)
CVE-2022-25761 7.5 HIGH Denial of Service (DoS)
CVE-2022-24298 7.5 HIGH Denial of Service (DoS)
CVE-2022-21208 7.5 HIGH Denial of Service (DoS)
CVE-2022-25231 7.5 HIGH Denial of Service (DoS)
CVE-2022-25304 7.5 HIGH Denial of Service (DoS)
CVE-2022-25302 7.5 HIGH Denial of Service (DoS)
CVE-2022-37428 6.5 MEDIUM PowerDNS Recursor 安全漏洞
CVE-2021-3839 DPDK 缓冲区错误漏洞
CVE-2021-3690 Red Hat JBoss Enterprise Application Platform资源管理错误漏洞
CVE-2022-35115 IceWarp WebClient SQL注入漏洞
CVE-2020-35509 Red Hat Keycloak 信任管理问题漏洞
CVE-2021-3827 Red Hat Keycloak 授权问题漏洞
CVE-2021-3798 openCryptoki 安全漏洞
CVE-2022-37111 BlueCMS SQL注入漏洞
CVE-2022-37112 BlueCMS SQL注入漏洞
CVE-2022-37113 BlueCMS SQL注入漏洞
CVE-2022-37223 jfinal cms SQL注入漏洞
CVE-2022-37199 jfinal cms SQL注入漏洞

Showing top 20 of 54 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: systemd
Same vendor: n/a
Same weakness: CWE-674

V. Comments for CVE-2021-3997

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