code injection

[cwong-scw]

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[temp-scw-app[bot]]

Micro-Learning Topic: Code Injection (CWE 94)

What is this? (2min video)

Code injection happens when an application insecurely accepts input that is subsequently used in a dynamic code evaluation call. If insufficient validation or sanitisation is performed on the input, specially crafted inputs may be able to alter the syntax of the evaluated code and thus alter execution. In a worst case scenario, an attacker could run arbitrary code in the server context and thus perform almost any action on the application server.

Try to identify instances where external input is subsequently used in a dynamic code evaluation call and identify the code context in which each input is used. Carefully review the data flow of these inputs and determine if appropriate filtering or encoding is being performed. You may need to look up language reference material to identify the language-specific special characters that any validation or sanitisation logic will need to account for.

Try this challenge in Secure Code Warrior

[dev-secure-code-warrior-pilot[bot]]

Micro-Learning Topic: Code Injection (CWE 94)

What is this? (2min video)

Code injection happens when an application insecurely accepts input that is subsequently used in a dynamic code evaluation call. If insufficient validation or sanitisation is performed on the input, specially crafted inputs may be able to alter the syntax of the evaluated code and thus alter execution. In a worst case scenario, an attacker could run arbitrary code in the server context and thus perform almost any action on the application server.

Try to identify instances where external input is subsequently used in a dynamic code evaluation call and identify the code context in which each input is used. Carefully review the data flow of these inputs and determine if appropriate filtering or encoding is being performed. You may need to look up language reference material to identify the language-specific special characters that any validation or sanitisation logic will need to account for.

Try this challenge in Secure Code Warrior

[temp-scw-app[bot]]

Micro-Learning Topic: Deserialization of Untrusted Data (OWASP Top 10 A8)

What is this? (2min video)

It is often convenient to serialize objects for communication or to save them for later use. However, serialized data or code can be modified. This malformed data or unexpected data could be used to abuse application logic, deny service, or execute arbitrary code when deserialized. This is usually done with "gadget chains", or a series of instances and method invocations that can self-execute during the deserialization process.

Identify where datastreams are deserialized into objects in your application - is the data source an untrusted resource? This might also indirectly affect the application through the use of frameworks, components or products that use deserialization under the hood. Make sure you are always using the latest version of the frameworks and/or products.

Try this challenge in Secure Code Warrior

[dev-secure-code-warrior-pilot[bot]]

Micro-Learning Topic: Deserialization of Untrusted Data (OWASP Top 10 A8)

What is this? (2min video)

It is often convenient to serialize objects for communication or to save them for later use. However, serialized data or code can be modified. This malformed data or unexpected data could be used to abuse application logic, deny service, or execute arbitrary code when deserialized. This is usually done with "gadget chains", or a series of instances and method invocations that can self-execute during the deserialization process.

Identify where datastreams are deserialized into objects in your application - is the data source an untrusted resource? This might also indirectly affect the application through the use of frameworks, components or products that use deserialization under the hood. Make sure you are always using the latest version of the frameworks and/or products.

Try this challenge in Secure Code Warrior

[temp-scw-app[bot]]

Micro-Learning Topic: Code Injection (Detected by phrase)

What is this? (2min video)

Code injection happens when an application insecurely accepts input that is subsequently used in a dynamic code evaluation call. If insufficient validation or sanitisation is performed on the input, specially crafted inputs may be able to alter the syntax of the evaluated code and thus alter execution. In a worst case scenario, an attacker could run arbitrary code in the server context and thus perform almost any action on the application server.

Try to identify instances where external input is subsequently used in a dynamic code evaluation call and identify the code context in which each input is used. Carefully review the data flow of these inputs and determine if appropriate filtering or encoding is being performed. You may need to look up language reference material to identify the language-specific special characters that any validation or sanitisation logic will need to account for.

Try this challenge in Secure Code Warrior

[dev-secure-code-warrior-pilot[bot]]

Micro-Learning Topic: Code Injection (Detected by phrase)

What is this? (2min video)

Code injection happens when an application insecurely accepts input that is subsequently used in a dynamic code evaluation call. If insufficient validation or sanitisation is performed on the input, specially crafted inputs may be able to alter the syntax of the evaluated code and thus alter execution. In a worst case scenario, an attacker could run arbitrary code in the server context and thus perform almost any action on the application server.

Try to identify instances where external input is subsequently used in a dynamic code evaluation call and identify the code context in which each input is used. Carefully review the data flow of these inputs and determine if appropriate filtering or encoding is being performed. You may need to look up language reference material to identify the language-specific special characters that any validation or sanitisation logic will need to account for.

Try this challenge in Secure Code Warrior