CVE-2021-44832
Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration
MEDIUM 6.6EPSS 97.9%
Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.
- Affected
- Apache Software Foundation · Apache Log4j2
- CVSS v3.1 NVD
- 6.6 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 8.5 HIGH
AV:N/AC:M/Au:S/C:C/I:C/A:C - EPSS
- 97.91% chance of exploitation in the next 30 days, 100th percentile
- Published
- 2021-12-28
- Updated
- 2026-05-29
Proof-of-concept exploits (3)
- Ryan2065/Log4ShellDetection5★ · 2022-01-18
- cckuailong/log4j_RCE_CVE-2021-448324★ · 2021-12-29
- hbeooooooom/Log4shell_poc1★ · 2025-01-02
Security advisories
- https://issues.apache.org/jira/browse/LOG4J2-3293
- https://lists.apache.org/thread/s1o5vlo78ypqxnzn6p8zf6t9shtq5143
- http://www.openwall.com/lists/oss-security/2021/12/28/1
- https://cert-portal.siemens.com/productcert/pdf/ssa-784507.pdf
- https://lists.debian.org/debian-lts-announce/2021/12/msg00036.html
- https://security.netapp.com/advisory/ntap-20220104-0001
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log…
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- advisories/GHSA-8489-44mv-ggj8