Constructing a drop-to-dl-resolve chain through ELF Dynamic Loading)
As we all know when you play the CTF server, PWN vulnerability issues generally provide an executable program and a libc library with dynamic links to program running. The library function offset address can be obtained through libc. so, and the address of the actual function in the process is calculated in combination with the libc function address in the leaked GOT table to bypass
The concrete idea does not say, compares the general, the Code also has the annotation. The use of the method is also not crap, is a simple global function encapsulation, do not understand the source of the comments or Google.
In addition, interested friends, you can try to change on the basis of this plugin can be entered a drop-down list. It's a similar idea, huh.
Demo and Code: Demo code Download
To run the code:
[Ctrl + A All SELECT Note: If the need to introduce external JS
css| Standard | Web site yesterday made a form, still use table layout, because the individual feel table layout table is good (the pursuit of Div refactoring, not equal to completely discard table).
Get up this morning and think about the layout of the form in a different way. Then the selection of DL, DD, DT, as follows:
XHTML section:
June Bao Company talent, the existing staff of 326 people, with research and development ... CSS section:
Trojan. DL. win32.autorun. yuz, Trojan. win32.inject. gh, Trojan. win32.agent. zsq, etc.
EndurerOriginal2007-10-231Version
Pe_xscan 07-08-30 by Purple endurer2007-10-22 13:13:44Windows XP Service Pack 2 (5.1.2600)Administrator user group
C:/Windows/system32/winlogon.exe * 604 | MICROSOFT (r) Windows (r) Operating System | 5.1.2600.2180 | Windows NT logon application | (c) Microsoft Corporation. all rights reserved. | 5.1.2600.2180 (xpsp_sp2_rtm.040803
Reading some papers about DL
Reading some papers about DL
Segnet A Deep convolutional encoder-decoder Architecture for Image segmentation
Encoder Network
Decoder Network
Training
Analysis
Personal Thoughts
Do convnets Learn correspondence
Ideas
Methods 1
Method 2
Personal Though
DOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> title>Titletitle>Head>Body>H3>Course IntroductionH3>article>H1>"Html5+css3 easy to get started and practical course"H1>article>P>HTML5+CSS3 easy access and combat course, HTML5 is the latest revision of HTML, developed by the World Wide Web Consortium in October 2014. The HTML5 is designed to support multimedia on mobile devices.P>aside>H2>Terminology Explanation:H2>DL> DT>HTML5DD>HTML5
First, the semantics of elements1. UL labelDraft of the Consortium:
The UL element represents an unordered list of items; that's, a list in which changing the order of the items would n OT change the meaning of list. Specification
Semantic 2. OL labelDraft of the Consortium:
The ol element represents a list (or sequence) of items; that's, a list in which the items are intentionally ordered, such that changing the order would the meaning of the list. Specification
S
div CSS page layout commonly used list elements ul ol li DL DT DD interpretation, block-level element div as little as possible, and table, nesting less the better
OL have sequence table.
The performance is:
1. ...
2. ...
3. ...
UL unordered list, showing that the front of the Li is a circle dot instead of 123
Many people easily ignore the use of DL DT DD
DL Cont
Core tips: DIV CSS page layout commonly used list elements ul ol li DL DT DD interpretation
OL ordered List
Performance as
1. ...2. ...3. ...
UL unordered list, showing that the front of the Li is a circle dot instead of 123
Many people easily ignore the use of DL DT DD
DL Content BlockThe caption of the DT content blockDD Content
You can write this:
Web page
div CSS page layout commonly used list elements ul ol li DL DT DD interpretation, block-level element div as little as possible, and table, nesting less the better
OL have sequence table.
The performance is:
1. ...2. ...3. ...
UL unordered list, showing that the front of the Li is a circle dot instead of 123
Many people easily ignore the use of DL DT DD
Yesterday made a form, still use table layout, because the personal feeling table layout table is good (the pursuit of Div refactoring, not equal to completely discard table).
Get up this morning and think about the layout of the form in a different way. Then the selection of DL, DD, DT, as follows:
XHTML section:
骏宝公司人才荟萃,现有职工326人,拥有研发 ...
CSS section:
dl{padding-left:14px;}dt{float:left;font-weig
Block-level element div as little as possible, in fact, as with table, the less nested the better, it will affect the speed!
OL has a sequence table.
......
......
......
Performance as:
1 ...
2 ...
3 ...
UL unordered list, shown as Li Front is a big circle dot instead of 123
......
......
Multi-person easy to ignore DL DT DD usage
DL Content Block
The title of
1 Section sections are used to divide different areas on a page, or to divide different sections in an article2 3 Header page header or section header4 5 Footer The bottom of the page or (section) at the bottom6 7 Nav navigation (contains a list of links)8 9 article is used to represent a complete and independent piece of content in a pageTen A post that can be used to present a forum, a magazine or newspaper article, a blog, user-submitted comment content, an interactive page module pendant, et
Block-level element div as little as possible, in fact, as with table, the less nested the better, it will affect the speed!OL has a sequence table.Performance as:1 ...2 ...3 ...UL unordered list, shown as Li Front is a big circle dot instead of 123Multi-person easy to ignore DL DT DD usageDL Content BlockThe title of the DT content blockDD ContentTo write like this:Ol,li,ul,dl,dt,dd
EndurerOriginal1Version
The message board page of this website:/------/
Implanted code:/------/Hxxp: // cool ***. 4*7*5 *** 55.com/k3.htm contains three malicious codes.
Malicious Code Segment 1:/------/
Hxxp: // cool ***. 4*7*5 *** 55.com/9.gifHack. suspiciousani) Contains information: "by mr. OWEN [F. s.t]", using the ani vulnerability to download xx.exe
File Description: D:/test/xx.exeAttribute: ---An error occurred while obtaining the file version information!Creation Time: 12:58:12Modificat
The Code of Trojan. DL. win32.agent. ZrC was implanted in a provincial Salt Industry Network.
EndurerOriginal1Version
Code is added to the header and tail of the homepage of the website:/------/
Hxxp: // H * ot ** peak. Host **. 2 * w ** cn.com/wm/index.htmCheck the cookie variable heiyeno2. If it does not exist, create the cookie and output the Code:/------/
Tcsafe.htmDownload xxz.exe, save it as tcsafe.com, and run it.
File Description: D:/test/xxz.
X tianyao Technology Co., Ltd. Trojan. DL. win32.mnless/win32.losabel
Original endurer2008-06-01 1st
Website code:/------/
Hxxp: // He * I * Dian *. go2. I ** Cp * C * n.com/wo/tzd.htm is an ASP Webpage that uses VBScript as a script and outputs VBScript.
The script uses the MS06-014 vulnerability to download hxxp: // He * I * Dian *. go2. I ** Cp * C * n.com/ OK .exe, through rundll32.exeto start.
File Description: D:/test/OK .exeAttribute: ---A
Source: http://blog.chinaunix.net/uid-26285146-id-3262288.html
These two functions are found when reading Hal-related source code.
In short, after the shared object is loaded by dynamically opening the dynamic library through dlopen, a handle is returned, and the function pointer you need to execute is located through dlsym, which can then be used in the program.
Dlopen -- open a dynamically linked Library
Dlsym -- get the address of a symbol in a dynamically linked Library
Example void * ha
After the android SDK is installed, run the android SDK manager to see the solution "failed to fetch URL http://dl-ssl.google.com/android/repository/addons_list" (the URL may be different.
Click search in the Start menu in the lower left corner of the desktop, copy the following path: c: \ windows \ system32 \ drivers \ etc to the search window, and click Search now to find the hosts file, it is actually a plain text file.
1. Open it with notepad
2.
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