Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-4104— Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2

Quick assessment

Affected
Apache Software Foundation Apache Log4j 1.x
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 Log4j 1.2存在代码问题漏洞，攻击者可利用该漏洞通过JMSApender反序列化来运行代码。

AI Predicted 8.8 Difficulty: Moderate EPSS 80.60% · P100

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Log4j 1.x Apache Log4j 1.2 1.2.x affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-4104

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2
Source: CVE Program / CVE List V5
Vulnerability Description
JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration. The attacker can provide TopicBindingName and TopicConnectionFactoryBindingName configurations causing JMSAppender to perform JNDI requests that result in remote code execution in a similar fashion to CVE-2021-44228. Note this issue only affects Log4j 1.2 when specifically configured to use JMSAppender, which is not the default. Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the previous versions.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Log4j 代码问题漏洞
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 Log4j 1.2存在代码问题漏洞，攻击者可利用该漏洞通过JMSApender反序列化来运行代码。
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)

Shenlong Deep Dive — AI Deep Analysis

10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.

Read summary Full analysis (login)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Log4j 1.x Apache Log4j 1.2 1.2.x -

II. Public POCs for CVE-2021-4104

# POC Description Source Link Shenlong Link
1 log4j 1.x RCE Poc -- CVE-2021-4104 https://github.com/cckuailong/log4shell_1.x POC Details
2 Log4j version 1.2.17 without the offending class responsible for CVE-2021-4104. https://github.com/open-AIMS/log4j POC Details
3 Flexnet is susceptible to Log4j JNDI remote code execution. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/other/flexnet-log4j-rce.yaml POC Details
4 None https://github.com/cuijiung/log4j-CVE-2021-4104 POC Details
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-4104

请登录查看更多情报信息。

Patches & Fixes for CVE-2021-4104 (1)

Vendor Advisories for CVE-2021-4104 (10)

Mailing List Discussions for CVE-2021-4104 (1)

Other References for CVE-2021-4104 (1)

Same Patch Batch · Apache Software Foundation · 2021-12-14 · 3 CVEs total

CVE-2021-44549 SMTPS server hostname not checked when making TLS connection to SMTPS server
CVE-2021-45046 Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a de

IV. Related Vulnerabilities

Same product: Apache Log4j 1.x
Same vendor: Apache Software Foundation
Same weakness: CWE-502

V. Comments for CVE-2021-4104

No comments yet

Leave a comment