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.
Mend Note: Maria's test
It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows 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 an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.
Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender. Fixed in Apache Log4j 2.12.3 and 2.13.1
The Apache Log4j Implementation
Library home page: https://logging.apache.org/log4j/2.x/log4j-core/
Path to dependency file: /pom.xml
Path to vulnerable library: /pom.xml
Found in HEAD commit: d445b5ff678ee057c010cfbfad2f93c3e3c391b1
Vulnerabilities
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
CVE-2021-44228
### Vulnerable Library - log4j-core-2.10.0.jarThe Apache Log4j Implementation
Library home page: https://logging.apache.org/log4j/2.x/log4j-core/
Path to dependency file: /pom.xml
Path to vulnerable library: /pom.xml
Dependency Hierarchy: - :x: **log4j-core-2.10.0.jar** (Vulnerable Library)
Found in HEAD commit: d445b5ff678ee057c010cfbfad2f93c3e3c391b1
Found in base branch: main
### Vulnerability DetailsApache 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. Mend Note: Maria's test
Publish Date: 2021-12-10
URL: CVE-2021-44228
### CVSS 3 Score Details (9.9)Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: Low - User Interaction: None - Scope: Changed - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High
For more information on CVSS3 Scores, click here. ### Suggested FixType: Upgrade version
Origin: https://logging.apache.org/log4j/2.x/security.html
Release Date: 2021-12-10
Fix Resolution: 2.12.2
:rescue_worker_helmet: Automatic Remediation will be attempted for this issue.
CVE-2021-45046
### Vulnerable Library - log4j-core-2.10.0.jarThe Apache Log4j Implementation
Library home page: https://logging.apache.org/log4j/2.x/log4j-core/
Path to dependency file: /pom.xml
Path to vulnerable library: /pom.xml
Dependency Hierarchy: - :x: **log4j-core-2.10.0.jar** (Vulnerable Library)
Found in HEAD commit: d445b5ff678ee057c010cfbfad2f93c3e3c391b1
Found in base branch: main
### Vulnerability DetailsIt was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows 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 an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.
Publish Date: 2021-12-14
URL: CVE-2021-45046
### CVSS 3 Score Details (9.0)Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: High - Privileges Required: None - User Interaction: None - Scope: Changed - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High
For more information on CVSS3 Scores, click here. ### Suggested FixType: Upgrade version
Origin: https://logging.apache.org/log4j/2.x/security.html
Release Date: 2021-12-14
Fix Resolution: 2.12.2
:rescue_worker_helmet: Automatic Remediation will be attempted for this issue.
CVE-2020-9488
### Vulnerable Library - log4j-core-2.10.0.jarThe Apache Log4j Implementation
Library home page: https://logging.apache.org/log4j/2.x/log4j-core/
Path to dependency file: /pom.xml
Path to vulnerable library: /pom.xml
Dependency Hierarchy: - :x: **log4j-core-2.10.0.jar** (Vulnerable Library)
Found in HEAD commit: d445b5ff678ee057c010cfbfad2f93c3e3c391b1
Found in base branch: main
### Vulnerability DetailsImproper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender. Fixed in Apache Log4j 2.12.3 and 2.13.1
Publish Date: 2020-04-27
URL: CVE-2020-9488
### CVSS 3 Score Details (3.7)Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: High - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: Low - Integrity Impact: None - Availability Impact: None
For more information on CVSS3 Scores, click here. ### Suggested FixType: Upgrade version
Origin: https://reload4j.qos.ch/
Release Date: 2020-04-27
Fix Resolution: 2.12.2
:rescue_worker_helmet: Automatic Remediation will be attempted for this issue.:rescue_worker_helmet:Automatic Remediation will be attempted for this issue.