Deserialization in Apache Log4j
CVE-2021-4104
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 causi…
Vulnerability class: Insecure Deserialization
EPSS: 0.722 (98.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Log4j — versions 1.2
- Apache Software Foundation Log4j 1.x — versions Apache Log4j 1.2 1.2.x
- Oracle Advanced_supply_chain_planning — versions 12.1, 12.2
- Oracle Business_intelligence — versions 5.9.0.0.0, 12.2.1.3.0, 12.2.1.4.0
- Oracle Business_process_management_suite — versions 12.2.1.3.0, 12.2.1.4.0
- Oracle Communications_eagle_ftp_table_base_retrieval — versions 4.5
- Oracle Communications_messaging_server — versions 8.1
- Oracle Communications_network_integrity — versions 7.3.6
- Oracle Communications_offline_mediation_controller — versions 12.0.0.5.0
- Oracle Communications_unified_inventory_management — versions 7.3.4, 7.3.5, 7.4.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2021-4104?
- CVE-2021-4104 is a high-severity vulnerability in Apache Log4j, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2021-12-14.
- How severe is CVE-2021-4104?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-4104 known to be exploited?
- 78 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.