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Android Privilege Elevation Vulnerability CVE-2014-7920 & CVE-2014-7921 Analysis

. so, and call gadget3 to write it to dev + 36: 3) Write call gadget Call gadget3 to modify the value of the audio_hw_device. get_input_buffer_size pointer. Use the pointer: libstagefright. so: 0x5EF88 + 1, which is recorded as gadget4. Gadget4: 3.4 trigger Code Execution The Code is as follows: Af-> getInputBufferSize (0, (audio_format_t) 0, (audio_channel_mask_t) 0 ); When getInputBufferSize () is called, The gadget4 execution is triggered: Register value: Call the system () function to loa

Android Multimedia Framework Summary (VI) C/s architecture of MediaPlayer

Reprint please the head source link and the tail two-dimensional code together reproduced, this article from:http://blog.csdn.net/hejjunlin/article/details/52435789In the preceding sections, all are called through the Java layer to JNI, and jni down to the C + + layer does not introduceLook at the Java layer a method in the C + + layer MediaPlayer follow-up processFrameworks/av/media/libmedia/mediaplayer.cppFind a familiar Setdataresource method to se

cve-2014-7920&cve-2014-7921 Analysis of Android right-of-reference vulnerability

audio.primary.goldfish.so, and the call Gadget3 writes to dev+36:3) write to call gadgetCall Gadget3 to modify Audio_hw_device. Get_input_buffer_size the value of the pointer, using point, libstagefright.so:0x5ef88+1, as Gadget4.GADGET4:3.4 Triggering Code executionUse the code to:Af->getinputbuffersize (0, (audio_format_t) 0, (audio_channel_mask_t) 0);When Getinputbuffersize () is called, gadget4 execution is triggered:Register Value:Call the system () function to load the outer command/data/l

DLNA&UPNP Development Notes (2)

By the first article we have a general understanding of the basic concepts of DLNA and the relationship with UPnP, this article mainly introduces the basic components of the UPnP protocol and the AV architecture.1. UPnP Protocol CompositionIn the UPnP protocol, two main components are defined, one is device, and the other is control point. This is why the interface code of the SDK for many UPnP stacks is generally composed of device and control point.

PLSql statement Learning (III)

parameters without writing in -- Query employee names based on department numbers Create or replace procedure p_getemp (no number) As Cursor c1 is select * from emp Where deptno = no; C1rec c1 % rowtype; Begin -- No: = 20; input parameters cannot be assigned values. For c1rec in c1 loop Dbms_output.put_line (c1rec. ename ); End loop; End; -- Output parameter out -- Find the average salary of the department according to the department number and return the average salary value -- In input (value

[IOS/translation] Media Layer

dynamics of UIKit. Provides reconciliation to improve user interaction experience. Core Graphics framework Core Graphics Library Core Animation Core Image OpenGL ES and GLKit Metal TextKit and Core Text Image I/O Photos Library IOS provides built-in methods for running applications, including Retina Display and standard differentiation display. For vector rendering, the system library automatically displays clear content in pixels on the Retina screen. If you use images in your application, UIK

Dark Horse programmer--c Pointers in language (2)

pointer to output all elements of array a , while the pointer PA points to the next cell of a[]Array names and arrays of pointer variables as function argumentsIn the fifth chapter, we have introduced the problem of using the arguments and parameters of the array famous function.It is easier to understand the problem after learning the pointer variable.The array name is the first address of the array, and the actual parameter to the parameter transfer array name is actually the address of the t

Android compiling script analysis on s5pv210 Development Board-[based on x210 Development Board]

$ {target_dir}/root >$ {target_dir}/cpio_list | {return 1 ;}$ Tools_dir/gen_init_cpio $ {target_dir}/cpio_list >$ {target_dir}/Android. IMG. cpio | {return 1 ;} # Create data.tarCD $ {target_dir}/Data | {echo "error: cocould not enter the $ {target_dir}/data directory."; return 1 ;}Rm-fr $ {target_dir}/data.tar | {return 1 ;}Tar CVF $ {target_dir}/data.tar./* | {return 1 ;}# Package all files generated in the data directory ***/ # Create system.tarCD $ {target_dir}/system | {echo "error: cocoul

Data Persistence UI pro in iOS _ 17

value // BOOL isLogin = [user boolForKey: @ login]; // NSLog (@ % d, isLogin ); // Data types supported by NSUserDefaults: array, dictionary, string, data, number, bool, integer, etc. // NSUserDefaults generally stores data of the numerical type and does not store large data. // Simulate the startup User Guide Diagram BOOL isFirstLogin = [user boolForKey: @ login]; if (NO = isFirstLogin) {NSLog (@ first startup); [user setBool: YES forKey: @ login]; [user synchronize]; // synchronize now} else

Powerful synchronization tool rsync detailed configuration and various gameplay, rsync detailed configuration gameplay

Powerful synchronization tool rsync detailed configuration and various gameplay, rsync detailed configuration gameplay Terms:Sync: SynchronizationAsync: asynchronousRsync: Remote Synchronization Rsync features:1. images can be used to save the entire directory tree and File System2. It is easy to retain the original permissions (permission, mode), owner, group, time (modification time, modify time), soft and hard links, File acl, and file attributes.3. high transmission efficiency. Only the chan

How does rsync exclude the specified folder for file synchronization?

In rsync synchronization settings, if we do not want to synchronize a folder, we can use exclude to exclude the specified folder. Next, I will introduce you to the specific implementation method. Very common: I want to synchronize/usr/boot/Under/, but I don't want to copy/proc/tmp folders. If you want to avoid a specific path, add-exclude directly. For example,-exclude "proc" -Exclude 'Sources' Note: the directory path is relative to the folder you are backing up. Note: This path must be a relat

The commonly used terms of the LED display to be known

Forum, The digital display interface standard is established.DVI Digital terminal than the standard VGA terminal signal is better, the digital interface to ensure that all content in digital format transmission, to ensure that the host to monitor the transmission of data integrity (no interference signal introduction), you can get a clearer image.Standard video input (RCA) interface: Also known as AV interface, usually is a pair of white audio interf

iOS Multimedia Framework Introduction

playlists. AV Foundation Framework. It provides a set of easy-to-use OBJECTIVE-C interfaces that you can use to manage the playback or recording of audio. OpenAL frame. It provides a set of interfaces for distributing azimuth audio across platforms. Core Audio Framework. It provides an interface that is simple and precise and can be used to play or record audio content. You can use these interfaces to play the system's alarm sounds, to tr

In-depth understanding of jni on android platform --- compiling ffmpeg source code

the config. sh script file$ Chmod + x config. sh$./Config. shIf the configuration is correct, the last two lines are shown as follows:License: nonfree and unredistributableCreating config. mak and config. h...3) EDIT config. h fileEdit the config. h file in the/root/ffmpeg/jni/ffmpeg-0.6.1 directory,Change # define restrict to # define restrictSet# Define HAVE_LLRINT 0# Define HAVE_LLRINTF 0# Define HAVE_LRINT 0# Define HAVE_LRINTF 0# Define HAVE_ROUND 0# Define HAVE_ROUNDF 0# Define HAVE_TRUNC

Quick Development Platform: big wet teach me to write programs (3) Automatic completion (no spring for silk), quick development platform

there is any problem. Please try again if there is any problem" Ii. Heavy wet AV tour(For more information about AV, see the previous blog "Teach me to write a program (2) the path to AV".) "Dear, there are two other small issues. suppliers on the header of the purchase order entry interface should be able to automatically complete the Purchase Order. The user e

"Codeforces 626E" Simple skewness

Test instructionsGives a set of n numbers, a subset of the maximum (the mean-median), the number of elements of the output subset, and the individual elements (in any order).AnalysisBecause it is a subset, it is not necessarily a sequential sequence. Then we have several conclusions.1. The maximum degree of skewness must be ≥0Because of an element, the skewness is 0.2. The maximum skewness subset must have an odd number of elements.CertificateIf the number of elements is even 2*k when the maximu

Linux Network Programming basics 2-UDP

a socket, and then enters the loop to receive and print the datagram sent from the client ):/*************************************** ********************************** Dgrecv. c-datativesreceiver* Usage: dgrecv portnum* Action: listens at the specfied port and reports messages*/ # Include # Include # Include # Include # Include # Define oops (m, x) {perror (m); exit (x );}/* The auxiliary functions make_dgram_server and get_internet_address will be defined in the file dgram. c provided later *

Article 1 Overview of Oracle Architecture)

. If the system supports asynchronous I/O, you can use multiple dbwr I/O to create a d B W R process from the (S L A V E) process. The number of dbwr I/O slave processes is set by the d B w r _ I/O _ s l av e s parameter in the I n I t. o r a file. If multiple d B w r processes are created, these processes are not called d B W R and they have a digital component. For example, if you create five d B W R processes, the operating system name of the proce

CEC for HDMI

Hdmi cec is one of the specifications of the HDMI connector. CEC is the specification of consumer electronics control, which can be translated as "consumer electronics product control" in Chinese 」. According to mingsiyi, The hdmi cec is an AV link provided by the industrial specifications. It is connected to multiple AV devices through the HDMI interface, you can use a single volume controller to control t

Dlna error, can't findlibavformat! Solution

Label: cant findlibavformat ibdlna-0.2.4 The Library version of dlna is libdlna-0.2.4 An error occurred while executing./configure: ------------------------------ Error dlibavformat! -------------------------------------------- View the config. log file: ---------------------------------------------------------- ... /Usr/local/lib/libavformat. A (RTP. O): In function 'ff _ rtp_get_payload_type ': /Home/won/downloads/FFMPEG/libavformat/RTP. C: 99: Undefined reference t

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