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CVE-2021-44832— Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration

Quick assessment

Affected
Apache Software Foundation Apache Log4j2
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.

Apache Log4j是美国阿帕奇（Apache）基金会的一款基于Java的开源日志记录工具。 Apache Log4j2 2.0-beta7 到 2.17.0版本存在注入漏洞，该漏洞源于软件中对于JDBC Appender 和JNDI 缺少有效的防护与过滤。有权修改日志配置文件的攻击者可以构建恶意配置 将 JDBC Appender 与引用 JNDI URI 的数据源一起使用，该 JNDI URI 可以执行远程代码。

AI Predicted 6.8 Difficulty: Easy EPSS 97.91% · P100

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Log4j2 log4j-core< 2.17.1 affected
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I. Basic Information for CVE-2021-44832

Vulnerability Information
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Vulnerability Title
Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration
Source: CVE Program / CVE List V5
Vulnerability Description
Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.
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
Apache Log4j 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Log4j是美国阿帕奇（Apache）基金会的一款基于Java的开源日志记录工具。 Apache Log4j2 2.0-beta7 到 2.17.0版本存在注入漏洞，该漏洞源于软件中对于JDBC Appender 和JNDI 缺少有效的防护与过滤。有权修改日志配置文件的攻击者可以构建恶意配置 将 JDBC Appender 与引用 JNDI URI 的数据源一起使用，该 JNDI URI 可以执行远程代码。
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
Apache Software Foundation Apache Log4j2 log4j-core ~ 2.17.1 -

II. Public POCs for CVE-2021-44832

# POC Description Source Link Shenlong Link
1 None https://github.com/cckuailong/log4j_RCE_CVE-2021-44832 POC Details
2 Discover Log4Shell vulnerability [CVE-2021-44832] https://github.com/name/log4j POC Details
3 Discover Log4Shell vulnerability [CVE-2021-44832] https://github.com/name/log4j-scanner POC Details
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III. Intelligence Information for CVE-2021-44832

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Vendor Advisories for CVE-2021-44832 (6)

Mailing List Discussions for CVE-2021-44832 (5)

Other References for CVE-2021-44832 (1)

IV. Related Vulnerabilities

Same product: Apache Log4j2
Same vendor: Apache Software Foundation
Same weakness: CWE-20

V. Comments for CVE-2021-44832

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