Apache · Log4j2
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
Qué es
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
CISA: Apache Log4j2 contains a vulnerability where JNDI features do not protect against attacker-controlled JNDI-related endpoints, allowing for remote code execution.
Qué hacer
For all affected software assets for which updates exist, the only acceptable remediation actions are: 1) Apply updates; OR 2) remove affected assets from agency networks. Temporary mitigations using one of the measures provided at https://www.cisa.gov/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.
Plazo para las agencias federales de EE. UU.: 24 de diciembre de 2021
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-s…
- debian.org/security/2021/dsa-5020
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedora…
- msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44…
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-s…
- Añadida a la lista de CISA
- 10 de diciembre de 2021
- Publicada
- 10 de diciembre de 2021
- Gravedad
- Crítica 10,0 CVSS 3.1
- Probabilidad de ataques en los próximos 30 días (EPSS)
- >99,9% entre el 0,1% superior de todas las vulnerabilidades conocidas
- Debilidad
- CWE-20 CWE-400 CWE-502
- Más detalles
- NVD · CVE.org · CISA
Todas las referencias (20)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
- https://www.debian.org/security/2021/dsa-5020
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU57UJDCFIAS…
- https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
- https://logging.apache.org/log4j/2.x/security.html
- http://www.openwall.com/lists/oss-security/2021/12/10/1
- http://www.openwall.com/lists/oss-security/2021/12/10/2
- http://www.openwall.com/lists/oss-security/2021/12/10/3
- https://security.netapp.com/advisory/ntap-20211210-0007/
- http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00007.html
- http://www.openwall.com/lists/oss-security/2021/12/13/2
- http://www.openwall.com/lists/oss-security/2021/12/13/1
- http://www.openwall.com/lists/oss-security/2021/12/14/4
- https://www.kb.cert.org/vuls/id/930724
- https://twitter.com/kurtseifried/status/1469345530182455296
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf
Más fallos explotados de Apache
| Añadido | Vulnerabilidad | Producto | Gravedad | Prob. de ataque |
|---|---|---|---|---|
| 1 may 2023 | Deserialization of Untrusted Data | Log4j2 | Crítica 9,0 | >99,9% |
| 8 oct 2026 | Command Injection | Struts | Alto 8,1 | 97% |
| 4 ago 2026 | Missing Encryption of Sensitive Data | Tomcat | Alto 7,5 | 99% |
| 16 abr 2026 | Improper Input Validation | ActiveMQ | Alto 8,8 | 98% |
| 1 may 2025 | Improper Escaping of Output | HTTP Server | Crítica 9,1 | >99,9% |
| 1 abr 2025 | Path Equivalence | Tomcat | Crítica 10,0 | 99,9% |
| 4 feb 2025 | Forced Browsing | OFBiz | Crítica 9,8 | >99,9% |
| 18 sept 2024 | Improper Access Control | HugeGraph-Server | Crítica 9,8 | 99,2% |
Fuentes: Known Exploited Vulnerabilities (CISA, dominio público), CVE records (cve.org) y EPSS (FIRST). La probabilidad de ataque es la estimación EPSS de que alguien intente explotar el fallo en los próximos 30 días.