Apache Log4j — библиотека журналирования (логирования) Java-программ

Уязвимость компонентов Chainsaw и SocketAppender программы для журналирования Java-программ Log4j, позволяющая нарушителю вызвать отказ в обслуживании

Apache Log4j 1.x (EOL) allows Denial of Service (DoS)

A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.

Уязвимость программы для журналирования Java-программ Log4j , связанная с небезопасным управлением привилегиями, позволяющая нарушителю повысить свои привилегии

ELSA-2022-9056: log4j security update (IMPORTANT)

SQL Injection in Log4j 1.2.x

Deserialization of Untrusted Data in Log4j 1.x

Deserialization of Untrusted Data in Apache Log4j

By design, the JDBCAppender in Log4j 1.2.x accepts an SQL statement as a configuration parameter where the values to be inserted are converters from PatternLayout. The message converter, %m, is likely to always be included. This allows attackers to manipulate the SQL by entering crafted strings into input fields or headers of an application that are logged allowing unintended SQL queries to be executed. Note this issue only affects Log4j 1.x when specifically configured to use the JDBCAppender, which is not the default. Beginning in version 2.0-beta8, the JDBCAppender was re-introduced with proper support for parameterized SQL queries and further customization over the columns written to in logs. Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the previous versions.

CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 Chainsaw was a component of Apache Log4j 1.2.x where the same issue exists.