By Anmol Misra, Abhishek Dubey
Android defense: assaults and Defenses is for a person drawn to studying in regards to the strengths and weaknesses of the Android platform from a safety viewpoint. beginning with an creation to Android OS structure and alertness programming, it is going to aid readers wake up to hurry at the fundamentals of the Android platform and its protection issues.
Explaining the Android safeguard version and structure, the ebook describes Android permissions, together with appear permissions, to aid readers learn functions and comprehend permission requisites. It additionally charges the Android permissions in accordance with safety implications and covers JEB Decompiler.
The authors describe how you can write Android bots in JAVA and the way to exploit reversing instruments to decompile any Android software. additionally they conceal the Android dossier process, together with import directories and documents, so readers can practice easy forensic research on dossier method and SD playing cards. The e-book comprises entry to a wealth of assets on its site: www.androidinsecurity.com. It explains easy methods to crack SecureApp.apk mentioned within the textual content and likewise makes the applying to be had on its site.
The publication comprises insurance of complex subject matters reminiscent of opposite engineering and forensics, cellular gadget pen-testing method, malware research, safe coding, and hardening guidance for Android. It additionally explains tips on how to study protection implications for Android cellular devices/applications and include them into firm SDLC processes.
The book’s website encompasses a source part the place readers can entry downloads for functions, instruments created by means of clients, and pattern purposes created via the authors less than the source part. Readers can simply obtain the records and use them at the side of the textual content, anywhere wanted. stopover at www.androidinsecurity.com for extra information.
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Additional info for Android Security: Attacks and Defenses
On line 3, we take the memory location of the stack and store it in the ESI register. This register now contains the pointer to the data. How does jmp know where the data is located? The 0x4 represents the amount of bytes that have to be jumped. Pushing the Arguments The jmp/call trick used to obtain the memory location of data, works great but makes the shellcode immense. Once you have struggled with a vulnerable program that uses small memory buffers, you will understand that the smaller the shellcode the better.
This often occurs with static buffers when the programmer does not account for a trailing null that is appended to the n-sized data (hence n+1) that is being written to the n-sized buffer. ■ Stack Overflow A stack overflow occurs when a buffer has been overrun in the stack space. The most common type of exploitable vulnerability is a stack overflow. String functions such as strcpy, strcat, and so on are common starting points when looking for stack overflows in source code. ■ Vulnerability A vulnerability is an exposure that has the potential to be exploited.
Database systems understand SQL commands, which are used to create, access, and modify data. 15 16 Chapter 1 • Writing Exploits and Security Tools ■ Stack The stack is an area of memory used to hold temporary data. It grows and shrinks throughout the duration of a program’s runtime. Common buffer overflows occur in the stack area of memory. When a buffer overrun occurs, data is overwritten to the saved return address which enables a malicious user to gain control. The strcpy LIBC function call is more commonly misimplemented because it copies data from one buffer to another without any size limitation.
Android Security: Attacks and Defenses by Anmol Misra, Abhishek Dubey