how to fix stack overflow error

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Introduction to Hacker attack and defense (i) buffer (stack) overflow

1. the outline A buffer overflow, also called a stack overflow (and a lot of salutation), is an unavoidable vulnerability for computer programs, unless there is a new design to replace the stack design that runs the program. The purpose of the overflow is to rewrite the pro

KETTLE _ memory overflow error and kettle overflow error

increase the memory value (multiples of 256) as follows: REM ******************************************************************REM ** Set java runtime options **REM ** Change 512m to higher values in case you run out of memory **REM ** or set the PENTAHO_DI_JAVA_OPTIONS environment variable **REM ******************************************************************if "%PENTAHO_DI_JAVA_OPTIONS%"=="" set PENTAHO_DI_JAVA_OPTIONS="-Xmx1024m" "-XX:MaxPermSize=

Preliminary understanding of Stack Overflow Vulnerability

argc,char *argc[]){ LoadLibrary("user32.dll"); char longbuf[100]="aaaaaaaaaaaabbbbcccccccccccc"; overflow(longbuf); return;}The program stops working as soon as it is run: Next let's take a look at the program: First, press the next address and parameter of the function into the stack: At this time, but do not run strcopy here: we will find that the parameter value is placed in the

Stack-Buffer Overflow Vulnerability

environment is a 32-bit ubuntu11.04 ): Stack frame Distribution C (high address) B A RET (return address) EBP Buffer1 Buffer2 (low address) Next we will look at a case where a segment error is caused by overwriting the returned address. See example2.c. example2.c---------------------------------------void function(char *str) {

Stack overflow case analysis under Linux-gdb debug Drills

call. Sure enough, the following illustration shows the problem:After executing the strcpy function, look at the last line of the countdown, the content of 0xbffff418 is modified to 0xbffff400; As a comparison, let's look at non-overflow versions:You can see that the EBP value of the last line has not been modified, so no error occurs.It is now possible to determine that the value of EBP has been modified

[Analysis] Symantec Firewall Kernel stack overflow vulnerability exploitation method summary

Summary of Symantec Firewall kernel Stack Overflow Vulnerability Creation Time:Article attributes: originalArticle submission: sobeit (kinsephi_at_hotmail.com) Summary of Symantec Firewall kernel Stack Overflow Vulnerability SobeitAccording to the report of the flashsky summit, I analyzed the vulnerability and wrote tw

How to use the GCC compilation option to detect Stack Overflow

additional code to detect buffer overflows, such as stack overflow attacks. This is done by adding a protection variable to the defective function. This includes functions that are called to alloca, and functions that have more than 8 byte buffers. When this function is executed, the protection variable is initialized and the protection variable is detected when the function exits. If the detection fails,

The utilization and optimization of shellcode in stack Overflow

original shellcode, encryption, add decryption machine code, add the end characterThe program has been uploaded to GitHubHttps://github.com/3gstudent/Shellcode-Generater/blob/master/enshellcode.cppAfter execution, generate a new Shellcode file, and in the screen output C format of the ShellcodeUse the following code, combined with the screen output C format shellcode, replace the array contents, the new encryption Shellcode testBecause the code is longer, upload to GitHub with the following add

Win7 open IE Prompt "stack overflow" of a variety of solutions

Win7 system to open IE browser when prompted "stack overflow, location: line 1th", the first such situation is generally IE in memory loading data, data in the memory stack caused by the overflow, users can be resolved according to the following scheme. Scheme one: Clear IE cache 1. Open IE browser → clic

I have 30 days to answer questions on the Stack Overflow quiz website.

leave a message in the answer to ask new and unrelated questions.The way I handle it is (it is recommended for other users to do the same): write a comment that tells the user what he did is wrong and what to do. At that time, I suggested that he go to Google this new problem, if you can't find the answer to the stack overflow ask a new question, rather than a user's answer to keep asking some unrelated qu

Program debugging technology-solving Stack Overflow

Preface The most painful thing for programmers is getting stuck in the bug Quagmire, and I have never been wrestling with it. Here, I will sum up some of my lessons, including endless loops, deadlocks, memory leaks, and memory access errors. If it can help my friends, that would be even better. However, I don't plan to write these articles in a step-by-step manner. Instead, I want to write a complete series at the end. This section uses a real example to describe how to debug the "

A stack overflow BUG

My blog: http://blog.striveforfreedom.netTable of Contents 1 BUG description 2. Solution Process 3 Summary 1 BUG description Recently I modified a C program and added several new fields to a struct. After compilation, a segment error (segmentation fault) crashed. Run gdb to view the cause of a crash: mov register offset (% rsp ).2. Solution Process From the command that caused the crash, we can see that the cause of the crash is that the memory on

Solution to process Kernel stack overflow caused by XFS

Solution to process Kernel stack overflow caused by XFSSystem Environment System Version: CentOS release 6.5 Kenel version: 2.6.32-431.20.3.el6.x86 _ 64 File System: XFS Problem description System panic and print the following calltrace information: kvm: 16396: cpu1 unhandled wrmsr: 0x391 data 2000000fBUG: scheduling while atomic:qemu-system-x86/27122/0xffff8811BUG: unable to handle kernel paging reques

[Practice] SQL Server ODBC Stack Overflow Attack implementation.

SQL Server ODBC Stack Overflow Attack implementation. Created:Article attributes: originalArticle submitted: flashsky (flashsky1_at_sina.com) ODBC overflow is the final solution.Since we only wanted to copy the Unicode code, a large number of addresses were overwritten for many reasons. As a result, some system data was overwritten and the code could not be execu

Tomcat memory overflow, stack configuration various adjustments

Partial parameter Description: -server: Be sure to be the first parameter, good performance on multiple CPUs -XMS: Initial heap size, minimum memory used, higher CPU performance should be set larger -xmx:java heap maximum value, maximum memory used -xx:permsize: Set the permanent storage area of memory -xx:maxpermsize: Set a permanent save area for maximum memory -xx:maxnewsize: +xx:aggressiveheap will make XMS meaningless. This parameter lets the JVM ignore the xmx parameter, eats up a G-physi

Utilization of Stack Overflow

Utilization of Stack OverflowWe proceed to the above stack overflow principle to explain the use of stack overflow, first of all we do not follow the previous article on the example to explain, I will write a C language example to explain. Let's talk about the

Stack Overflow Architecture

Unsurprisingly, and unexpectedly, Stack overflow still uses Microsoft's products heavily. They think that since Microsoft's infrastructure can meet demand and be cheap enough, there is no reason to make fundamental changes. And where needed, they also used Linux. At its root, everything is for performance.Another area of concern is that the Stack

Pcman ftp stor Command Stack Overflow

return address. Because the stack is extended from the high address to the low address, when overflow occurs, the content written in the low address exceeds the buffer size, thus overwriting the eip value of the high address, cause overflow. If it is a function stack, we can control the buffer [128]. When the input c

[Software debugging Study Notes] cookie-based security check mechanism to prevent Stack Buffer Overflow

Buffer Overrun Definition Buffer isProgramThe continuous memory area used to store data. Once the allocation is completed, the starting address and urine are fixed. When the program is running, if the buffer area is exceeded, buffer overflow or buffer overrun occurs ). If the buffer is allocated to a stack, it is called Stack Buffer Overrun. If the buffer is al

10.1.1 avoid stack overflow of tail recursion

10.1.1 avoid stack overflow of tail recursionFor each function call, the runtime allocates a stack frame. These frames are stored in a stack maintained by the system, the call is completed, the stack frame is deleted, and if the function calls other functions, a new frame is

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