Dereferencing NULL pointers can create denial of service attacks. In this video, Mike Chapple explains the nature of this attack and ways to defend against it.
- [Instructor] Let's talk about another vulnerability … that might exist in software applications, … dereferencing NULL pointers. … First, we need to talk a little bit … about how operating systems manage memory. … Computer systems have large amounts of memory … available to them, and that memory is used … for many different purposes. … Some is used by the operating system. … Other parts are used by different applications … that run on the computer, and some is empty, awaiting use. … The amount of memory used by any one of these components … varies as activity on the system changes. … To be efficient, the operating system allocates memory … for different purposes when it receives a request … from an application or another operating system component. … It then assigns a portion of memory to that use, … providing a specific address and memory … as the location that may be used for that purpose. … For example, if an application requests … a chunk of memory to store a photograph, … the memory manager finds an available space in memory …
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- Configuring vulnerability scans
- Reporting scan results
- Barriers to vulnerability remediation
- Analyzing scan reports
- Common server, endpoint, and network vulnerabilities
- Software security issues, such as SQL injection
- Access control vulnerabilities
Skill Level Advanced
Learning Vulnerability Managementwith Lora Vaughn53m 54s Beginner
Learning Threat Modeling for Security Professionalswith Adam Shostack41m 41s Intermediate
Threat Modeling: Information Disclosure in Depthwith Adam Shostack29m 23s Intermediate
1. Creating a Vulnerability Management Program
2. Configuring and Executing Vulnerability Scans
3. Remediating Vulnerabilities
4. Analyzing Scan Results
5. Common Vulnerabilities
6. Software Security Issues
7. Specialized Technology Vulnerabilities
8. Access Control Vulnerabilities
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