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CVE-2021-3100— Log4j hot patch package privilege escalation

Quick assessment

Affected
Amazon Web Services log4j-cve-2021-44228-hotpatch
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.

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。 Amazon Linux log4j-cve-2021-44228-hotpatch 1.1-12 版本之前存在安全漏洞，该漏洞源于 log4j-cve-2021-44228-hotpatch-1.1-12 之前的 Apache Log4j hotpatch 包没有模仿被修补的 JVM 的权限，允许它提升权限。

CVSS 8.8 · High EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-3100

Vulnerability Information
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Vulnerability Title
Log4j hot patch package privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
带着不必要的权限执行
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Log4j 安全漏洞
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。 Amazon Linux log4j-cve-2021-44228-hotpatch 1.1-12 版本之前存在安全漏洞，该漏洞源于 log4j-cve-2021-44228-hotpatch-1.1-12 之前的 Apache Log4j hotpatch 包没有模仿被修补的 JVM 的权限，允许它提升权限。
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
Amazon Web Services log4j-cve-2021-44228-hotpatch unspecified ~ 1.1-13 -

II. Public POCs for CVE-2021-3100

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III. Intelligence Information for CVE-2021-3100

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Vendor Advisories for CVE-2021-3100 (1)

Other References for CVE-2021-3100 (2)

Same Patch Batch · Amazon Web Services · 2022-04-19 · 4 CVEs total

CVE-2021-3101 8.8 HIGH Hotdog Container Escape
CVE-2022-0070 8.8 HIGH Log4j hot patch package privilege escalation
CVE-2022-0071 8.8 HIGH Hotdog Container Escape

IV. Related Vulnerabilities

Same product: log4j-cve-2021-44228-hotpatch
Same vendor: Amazon Web Services
Same weakness: CWE-250

V. Comments for CVE-2021-3100

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