What is the main characteristic of a time-of-check to time-of-use (TOCTTOU) flaw? It leads to confidentiality and integrity failures. It exploits the delay between the check and use of access rights. It occurs when access to an object is not universally checked. It involves changing the order of instructions and procedures in concurrent execution.
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TOCTTOU flaws exploit a timing window between the verification of access rights and the actual use of those rights. Show more…
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a) The following are seven features that may be provided by a security system. For each, write a sentence describing what is meant by the feature: i. Confidentiality: This feature ensures that information is only accessible to authorized individuals and is kept private from unauthorized users. ii. Integrity: This feature ensures that information remains unchanged and unaltered during storage, transmission, and processing. iii. Availability: This feature ensures that information and resources are accessible and usable by authorized users whenever needed. iv. Non-repudiation: This feature ensures that the origin and authenticity of a message or transaction cannot be denied by the sender. v. Authentication: This feature verifies the identity of users or entities to ensure that they are who they claim to be. vi. Access control: This feature restricts and manages user access to information and resources based on their authorization levels. vii. Accountability: This feature tracks and records user actions and activities to ensure responsibility and traceability. b) A University department has a file called exam marks, which contains a list of examination marks indexed by student names in alphabetical order. A student manages to access the exam marks file. The student cannot read the file since it is encrypted. However, they can work out the position of their own mark, making use of the fact that the students are listed in alphabetical order. The student swaps their mark with that of the student who is always 'top of the class'. Discuss which of the security features listed in part A have been breached.
Akash M.
What are the flaws of privilege level control?
C3.1 Inspect the method of corruption done to UDP packet by an attacker to perform BONK attack. C3.2 Discuss why buffer overflow attack succeeds. Also analyse the working of an attack which uses buffer overflow. C3.3 Determine the implication on security of your company, if the enforcement section is omitted from your security policy. C3.4 Discuss the importance of Log reviewing in your company as stated in security policy. Also how do we decide on the frequency of Log review in security policy?
Madhur L.
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