Control hijacking in computer system security

What Is Session Hijacking, and How Can It Be Prevented? Session hijacking is a technique used by hackers to gain access to a target’s computer or online accounts. In a session hijacking attack, a hacker takes control of a user’s browsing session to gain access to their personal information and passwords. This article will explain what session hijacking is, how it works, and how to prevent it from happening. How Does Session Hijacking Work? A session hijacker can take control of a user’s session in several ways. One common method is to use a packet sniffer to intercept the communication between the user and the server, which allows the hacker to see what information is being sent and received. They can then use this information to log in to the account or access sensitive data. Session hijacking can also be performed by deploying malware to infect the user’s computer. This gives the hacker direct access to the machine, enabling them to then hijack any active sessions. What Are the Different Types of Session Hijacking? Session hijacking can be either active or passive. In active session hijacking, the attacker takes control of the target’s session while it is still active. The attacker does this by sending a spoofed request to the server that includes the target’s session ID. This type of attack is more challenging to execute because it requires the attacker to have an OnPath (also known as “man-in-the-middle”) position between the target and the server. Passive session hija...

In today's threatscape, antimalware software provides little peace of mind. In fact, antimalware scanners are horrifically inaccurate, especially with exploits less than 24 hours old. Malicious hackers and malware can change their tactics at will. Swap a few bytes around, and a previously recognized To combat this, many antimalware programs monitor program behaviors, often called heuristics, to catch previously unrecognized malware. Other programs use virtualized environments, system monitoring, network traffic detection and all of the above to be more accurate. Still they fail us on a regular basis. If they fail, you need to know how to spot malware that got through. How to know if you've been hacked Here are 15 sure signs you've been hacked and what to do in the event of compromise. • You get a ransomware message • You get a fake antivirus message • You have unwanted browser toolbars • Your internet searches are redirected • You see frequent, random popups • Your friends receive social media invitations from you that you didn’t send • Your online password isn’t working • You observe unexpected software installs • Your mouse moves between programs and makes selections • Antimalware, Task Manager or Registry Editor is disabled • Your online account is missing money • You’ve been notified by someone you’ve been hacked • Confidential data has been leaked • Your credentials are in a password dump • You observe strange network traffic patterns Note that in all cases, the numbe...

A session hijacking attack involves an attacker intercepting packets between two components on a SAN and taking control of the session between them by inserting their own packets onto the SAN. This is basically a variant of the man-in-the-middle attack but involves taking control of an aspect of the SAN instead of just capturing data packets. As with man-in-the-middle attacks, the attacker must gain physical access to the SAN to implement this approach. Session hijacking is probably more likely to occur on the LAN in an attempt to gain access to the management interface of a SAN component. The following is a session hijacking attack countermeasure: Since this type of attack requires that an attacker be physically plugged into the SAN, they can be defeated by the methods described in the Physical Attacks section. Table e61.1 summarizes the various best practices and the potential vulnerabilities they address. Best Practices Threats Empty Cell Empty Cell Physical Management Control Host WWN Spoof Man-in-the-Middle E-Port Replication DoS Session Hijack Physical access X X X X X Change management X X X Password policies X X X Defense-in-depth X X X X Vendor review X Data classification X Security setup X X X X Unused capabilities X X Auditing X X X Updates X X Monitoring X X Security maintenance X X X Configuration information protection X X X X X X X X Separation of functions X Tool access X Limit connectivity X Partitioning X X X X X X X S_ID checking X Encryption X X X Repl...

Control Hijacking The solution to the above problem is to divide the program into small parts. And check the output of the program at every step, due to which all the output will never be incorrect at the same time. Hence, lines of the program overwritten by the attacker can easily be traced after which the error can also be removed. Buffer Overflow The solution to the problem is that always specify the memory space before the execution of the program, as a result, the execution of the program will stop when the specified memory space is full and therefore the condition of overflow is avoided. Hence, the memory can be protected from hacker attacks. Types of Buffer overflow attack: Stack Based Overflow & Heap Based Overflow • Stack-Based Buffer Overflow: The condition when the different location of stack memory starts overflowing and the data at that memory location can be easily hacked by the hacker. This method is easy to implement and information can be extracted easily. The solution is to initialize the memory location before the program executes. So, that overflow can be prevented and data can be protected. • Heap-Based Buffer Overflow: The condition when the entire memory starts overflowing can be hacked easily and is called a heap-based buffer overflow. This condition normally doesn’t exist, or else the entire memory of the computer will crash. The solution is to prevent the overflow by specifying the memory location as a result the execution will stop and data will ...

Control Hijacking The solution to the above problem is to divide the program into small parts. And check the output of the program at every step, due to which all the output will never be incorrect at the same time. Hence, lines of the program overwritten by the attacker can easily be traced after which the error can also be removed. Buffer Overflow The solution to the problem is that always specify the memory space before the execution of the program, as a result, the execution of the program will stop when the specified memory space is full and therefore the condition of overflow is avoided. Hence, the memory can be protected from hacker attacks. Types of Buffer overflow attack: Stack Based Overflow & Heap Based Overflow • Stack-Based Buffer Overflow: The condition when the different location of stack memory starts overflowing and the data at that memory location can be easily hacked by the hacker. This method is easy to implement and information can be extracted easily. The solution is to initialize the memory location before the program executes. So, that overflow can be prevented and data can be protected. • Heap-Based Buffer Overflow: The condition when the entire memory starts overflowing can be hacked easily and is called a heap-based buffer overflow. This condition normally doesn’t exist, or else the entire memory of the computer will crash. The solution is to prevent the overflow by specifying the memory location as a result the execution will stop and data will ...

What Is Session Hijacking, and How Can It Be Prevented? Session hijacking is a technique used by hackers to gain access to a target’s computer or online accounts. In a session hijacking attack, a hacker takes control of a user’s browsing session to gain access to their personal information and passwords. This article will explain what session hijacking is, how it works, and how to prevent it from happening. How Does Session Hijacking Work? A session hijacker can take control of a user’s session in several ways. One common method is to use a packet sniffer to intercept the communication between the user and the server, which allows the hacker to see what information is being sent and received. They can then use this information to log in to the account or access sensitive data. Session hijacking can also be performed by deploying malware to infect the user’s computer. This gives the hacker direct access to the machine, enabling them to then hijack any active sessions. What Are the Different Types of Session Hijacking? Session hijacking can be either active or passive. In active session hijacking, the attacker takes control of the target’s session while it is still active. The attacker does this by sending a spoofed request to the server that includes the target’s session ID. This type of attack is more challenging to execute because it requires the attacker to have an OnPath (also known as “man-in-the-middle”) position between the target and the server. Passive session hija...

In today's threatscape, antimalware software provides little peace of mind. In fact, antimalware scanners are horrifically inaccurate, especially with exploits less than 24 hours old. Malicious hackers and malware can change their tactics at will. Swap a few bytes around, and a previously recognized To combat this, many antimalware programs monitor program behaviors, often called heuristics, to catch previously unrecognized malware. Other programs use virtualized environments, system monitoring, network traffic detection and all of the above to be more accurate. Still they fail us on a regular basis. If they fail, you need to know how to spot malware that got through. How to know if you've been hacked Here are 15 sure signs you've been hacked and what to do in the event of compromise. • You get a ransomware message • You get a fake antivirus message • You have unwanted browser toolbars • Your internet searches are redirected • You see frequent, random popups • Your friends receive social media invitations from you that you didn’t send • Your online password isn’t working • You observe unexpected software installs • Your mouse moves between programs and makes selections • Antimalware, Task Manager or Registry Editor is disabled • Your online account is missing money • You’ve been notified by someone you’ve been hacked • Confidential data has been leaked • Your credentials are in a password dump • You observe strange network traffic patterns Note that in all cases, the numbe...

A session hijacking attack involves an attacker intercepting packets between two components on a SAN and taking control of the session between them by inserting their own packets onto the SAN. This is basically a variant of the man-in-the-middle attack but involves taking control of an aspect of the SAN instead of just capturing data packets. As with man-in-the-middle attacks, the attacker must gain physical access to the SAN to implement this approach. Session hijacking is probably more likely to occur on the LAN in an attempt to gain access to the management interface of a SAN component. The following is a session hijacking attack countermeasure: Since this type of attack requires that an attacker be physically plugged into the SAN, they can be defeated by the methods described in the Physical Attacks section. Table e61.1 summarizes the various best practices and the potential vulnerabilities they address. Best Practices Threats Empty Cell Empty Cell Physical Management Control Host WWN Spoof Man-in-the-Middle E-Port Replication DoS Session Hijack Physical access X X X X X Change management X X X Password policies X X X Defense-in-depth X X X X Vendor review X Data classification X Security setup X X X X Unused capabilities X X Auditing X X X Updates X X Monitoring X X Security maintenance X X X Configuration information protection X X X X X X X X Separation of functions X Tool access X Limit connectivity X Partitioning X X X X X X X S_ID checking X Encryption X X X Repl...