What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-19 · updated 2026-06-17
• Weakness: CWE-250

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.

Affected products

• Amazon Log4Jhotpatch: before 1.1-13 — fixed in 1.1-13

How to fix

Upgrade to a fixed version: Amazon Log4Jhotpatch 1.1-13. Check the vendor advisory for mitigations.

References

• https://alas.aws.amazon.com/AL2/ALAS-2021-1732.html
• https://alas.aws.amazon.com/ALAS-2021-1554.html
• https://unit42.paloaltonetworks.com/aws-log4shell-hot-patch-vulnerabilities
• https://alas.aws.amazon.com/AL2/ALAS-2021-1732.html
• https://alas.aws.amazon.com/ALAS-2021-1554.html
• https://unit42.paloaltonetworks.com/aws-log4shell-hot-patch-vulnerabilities

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