CVE-2021-45046 – org.ops4j.pax.logging:pax-logging-log4j2

Package

Manager: maven
Name: org.ops4j.pax.logging:pax-logging-log4j2
Vulnerable Version: >=1.8.0 <1.9.2 || >=1.10.0 <1.10.8 || >=1.11.0 <1.11.11 || >=2.0.0 <2.0.12

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

EPSS: 0.9434 pctl0.99947

Details

Incomplete fix for Apache Log4j vulnerability # Impact The fix to address [CVE-2021-44228](https://nvd.nist.gov/vuln/detail/CVE-2021-44228) in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allow attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in a remote code execution (RCE) attack. ## Affected packages Only the `org.apache.logging.log4j:log4j-core` package is directly affected by this vulnerability. The `org.apache.logging.log4j:log4j-api` should be kept at the same version as the `org.apache.logging.log4j:log4j-core` package to ensure compatability if in use. # Mitigation Log4j 2.16.0 fixes this issue by removing support for message lookup patterns and disabling JNDI functionality by default. This issue can be mitigated in prior releases (< 2.16.0) by removing the JndiLookup class from the classpath (example: zip -q -d log4j-core-*.jar org/apache/logging/log4j/core/lookup/JndiLookup.class). Log4j 2.15.0 restricts JNDI LDAP lookups to localhost by default. Note that previous mitigations involving configuration such as to set the system property `log4j2.formatMsgNoLookups` to `true` do NOT mitigate this specific vulnerability.

Metadata

Created: 2021-12-14T18:01:28Z
Modified: 2025-05-09T12:28:40Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/12/GHSA-7rjr-3q55-vv33/GHSA-7rjr-3q55-vv33.json
CWE IDs: ["CWE-502", "CWE-917"]
Alternative ID: GHSA-7rjr-3q55-vv33
Finding: F096
Auto approve: 1