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Spring4Shell as a class injection example
Two serious vulnerabilities leading to remote code execution (RCE) have been found in the popular Spring framework, one in Spring Core and the other in Spring Cloud Functions.
JNDI injection
Java Naming and Directory Interface (JNDI) is a Java API that allows clients to discover and look up data and objects via a name.
JNDI injection. Log4Shell case study
On December 10, 2021, Apache released a fix for CVE-2021-44228, a critical RCE vulnerability affecting Log4j that is being exploited in the wild.
JNDI injection. JDBC
Preventing JNDI injection vulnerabilities by using a source code review is always a good idea.
Insecure deserialization
Insecure deserialization is when user-controllable data is deserialised by a website. This potentially enables an attacker to manipulate serialised objects in order to pass harmful data into the application code.
Input processing vulnerabilities
Input validation is a frequently-used technique for checking potentially dangerous inputs in order to ensure that the inputs are safe for processing within the code, or when communicating with other components. When software does not validate input properly, an attacker is able to craft the input in a form that is not expected by the rest of the ap…