Log4Shell — Apache Log4j Improper input validation
CVE-2021-45105
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.740 (98.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Apache Log4j
- Apache Software Foundation Log4j2 — versions log4j-core
- Netapp Cloud_manager
- Oracle Agile_engineering_data_management — versions 6.2.1.0
- Oracle Agile_plm — versions 9.3.6
- Oracle Agile_plm_mcad_connector — versions 3.6
- Oracle Autovue_for_agile_product_lifecycle_management — versions 21.0.2
- Oracle Banking_deposits_and_lines_of_credit_servicing — versions 2.12.0
- Oracle Banking_enterprise_default_management — versions 2.7.1, 2.12.0
- Oracle Banking_loans_servicing — versions 2.12.0
Weakness classification (CWE)
Public proof-of-concept exploits
- cckuailong/Log4j_dos_CVE-2021-45105
- iAmSOScArEd/log4j2_dos_exploit
- name/log4j-remediation
- dileepdkumar/https-github.com-pravin-pp-log4j2-CVE-2021-45105-1
- dileepdkumar/https-github.com-dileepdkumar-https-github.com-pravin-pp-log4j2-CVE-2021-45105-v
- dileepdkumar/https-github.com-dileepdkumar-https-github.com-pravin-pp-log4j2-CVE-2021-45105
- dileepdkumar/https-github.com-pravin-pp-log4j2-CVE-2021-45105
- tejas-nagchandi/CVE-2021-45105
- pravin-pp/log4j2-CVE-2021-45105
- CUBETIQ/cubetiq-security-advisors
References
- security@apache.org (x_refsource_MISC, Release Notes, Vendor Advisory)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
- security@apache.org (US Government Resource, x_refsource_CERT-VN, Third Party Advisory, third-party-advisory)
- security@apache.org (x_refsource_CISCO, vendor-advisory, Third Party Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory, Mitigation)
- security@apache.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
- security@apache.org (VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-45105?
- CVE-2021-45105 is a medium-severity vulnerability in Apache Log4j, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2021-12-18.
- How severe is CVE-2021-45105?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2021-45105 known to be exploited?
- 148 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.