D385 Logging And Security Issues: Questions With
Step-by-Step Solutions
What are some common debugging techniques? Correct Answer - -
printing out values of variables
- changing the state ("path") of the program to make it do different things
- stepping through the execution of a program line by line
- breakpoints
- trace points
- stopping the program at certain events
- viewing the output of a program in a debugger window
What are some Python debugging tools? Correct Answer - - pdb: most
commonly used
- Web-PDB
- wdb
- Pyflame
- objgraph
XML External Entity Attacks Correct Answer - - XXE
- when attackers exploit an XML parser to read arbitrary files on your server
- attackers might also be able to read config files, retrieve user information
Insecure Deserialization Correct Answer - - serialization is the conversion
of an object in a programming language is saved into a format that can be
saved to a database
- DEserialization is when a serialized object is read from a file or the network
and converted back into an object
- INSECURE DESERIALIZATION occurs when an attacker can manipulate the
serialized object and achieve authentication bypass, DOS, or arbitrary code
execution
Injection Attacks Correct Answer - - when an application cannot properly
distinguish between untrusted user data and code
- typically allows for arbitrary code execution
SQL Injection Attack Mitigation Correct Answer - - use parameterized
statements
, Log Injection Attack Mitigation Correct Answer - - prefixing log entries
with meta-data (i.e. timestamp)
- validate the entry before accessing or opening
Sensitive Data Leaks Correct Answer - - occurs when an application fails to
properly protect sensitive information
- this typically occurs through descriptive response headers, descriptive error
messages with stack traces or database error messages, or revealing
comments in HTML files
Cross-site Request Forgery Correct Answer - - client-side technique used
to attack other users of a web application
- attackers send HTTP requests that pretend to come from the victim
- attackers then carry out unwanted actions such as changing a password or
transferring money from a bank account
CSRF Mitigation Correct Answer - - CSRF tokens
- SameSite cookies
- avoid using GET requests for state-changing actions
SSRF Correct Answer - - Server-side Request Forgery
- attacker us able to send requests on behalf of the server
- allows attackers to forge the request signature and assume a privileged
position on a network, bypassing firewall controls, and gaining access to
internal services
SSRF Mitigation Correct Answer - - never make outbound requests based
on user input
- validate external addresses before initiating any outbound requests
PDB Correct Answer - - debugger built into the Python standard library
Which three actions are supported by the Python Debugger (PDB)? (Choose 3
answers.) Correct Answer - - establishing breakpoints
- code step throughs
- stack tracing
Step-by-Step Solutions
What are some common debugging techniques? Correct Answer - -
printing out values of variables
- changing the state ("path") of the program to make it do different things
- stepping through the execution of a program line by line
- breakpoints
- trace points
- stopping the program at certain events
- viewing the output of a program in a debugger window
What are some Python debugging tools? Correct Answer - - pdb: most
commonly used
- Web-PDB
- wdb
- Pyflame
- objgraph
XML External Entity Attacks Correct Answer - - XXE
- when attackers exploit an XML parser to read arbitrary files on your server
- attackers might also be able to read config files, retrieve user information
Insecure Deserialization Correct Answer - - serialization is the conversion
of an object in a programming language is saved into a format that can be
saved to a database
- DEserialization is when a serialized object is read from a file or the network
and converted back into an object
- INSECURE DESERIALIZATION occurs when an attacker can manipulate the
serialized object and achieve authentication bypass, DOS, or arbitrary code
execution
Injection Attacks Correct Answer - - when an application cannot properly
distinguish between untrusted user data and code
- typically allows for arbitrary code execution
SQL Injection Attack Mitigation Correct Answer - - use parameterized
statements
, Log Injection Attack Mitigation Correct Answer - - prefixing log entries
with meta-data (i.e. timestamp)
- validate the entry before accessing or opening
Sensitive Data Leaks Correct Answer - - occurs when an application fails to
properly protect sensitive information
- this typically occurs through descriptive response headers, descriptive error
messages with stack traces or database error messages, or revealing
comments in HTML files
Cross-site Request Forgery Correct Answer - - client-side technique used
to attack other users of a web application
- attackers send HTTP requests that pretend to come from the victim
- attackers then carry out unwanted actions such as changing a password or
transferring money from a bank account
CSRF Mitigation Correct Answer - - CSRF tokens
- SameSite cookies
- avoid using GET requests for state-changing actions
SSRF Correct Answer - - Server-side Request Forgery
- attacker us able to send requests on behalf of the server
- allows attackers to forge the request signature and assume a privileged
position on a network, bypassing firewall controls, and gaining access to
internal services
SSRF Mitigation Correct Answer - - never make outbound requests based
on user input
- validate external addresses before initiating any outbound requests
PDB Correct Answer - - debugger built into the Python standard library
Which three actions are supported by the Python Debugger (PDB)? (Choose 3
answers.) Correct Answer - - establishing breakpoints
- code step throughs
- stack tracing
