The data, tools, and procedures which, when applied to a specific vulnerability, predictably violate the security design of a system.

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2
votes
3answers
75 views

Should it considered a risk if an organization's server OS and version information is leaked? [duplicate]

I am assuming that it should be considered a risk because there may be several security issues of various OSes known to hackers. If a hacker gets access into the victim's network, the extra knowledge ...
-3
votes
2answers
210 views

How to find Use-After-Free vulnerbilities? [closed]

I followed a lot of tutorials about the exploitation of UAF vulnerabilities, but there was never explained how to find and detect uaf vulnerabilities in javascript or html (i.e. with a static analysis ...
6
votes
2answers
220 views

Cost of finding vulnerabilities vs developing exploits

From the perspective of someone who wants to develop a zero-day exploit against some software application or target, there are broadly speaking two tasks that the attacker must do: (1) find a new ...
1
vote
2answers
72 views

Is it possible to plan for race conditions?

Is it possible to plan for race conditions, so that you can execute specific commands at a specific time? For example, the following code is vulnerable to a race condition. Is it possible to modify ...
1
vote
0answers
103 views

Windows 7 remote desktop access to utilman or stickykeys?

Is anyone aware of a windows 7 procedure where the attacker is able to access the host machine remotely via RDP on port 3389, and implement the utilman and/or stickykey exploit? afaik the utilman ...
2
votes
1answer
327 views

How to exploit a Use-After-Free vulnerability?

I want to learn more about use-after-free vulnerabilities and found this tutorial. Yet I don't understand it very well and hope for an explanation of how it works.
3
votes
2answers
179 views

Should ability to access login page after authentication be considered a security flaw?

On one of the recent engagements, I bumped into something I have not seen before: after successful authentication attempt the user still can access the login web page and login as another user. It ...
0
votes
2answers
148 views

Are regular expressions vulnerable to code injection?

Aside from having an excessive input length, is there a way of doing an exploit with a regular expression (assuming the underlying language/platform is secure)? Practically I was wondering if the ...
49
votes
3answers
39k views

Stack Overflows - Defeating Canaries, ASLR, DEP, NX

To prevent buffer overflows, there are several protections available such as using Canary values, ASLR, DEP, NX. But, where there is a will, there is a way. I am researching on the various methods an ...
4
votes
1answer
91 views

Armitage check exploit

I am with all fairness not the most experienced penetration tester, I am doing an industry placement where I can improve my skills. I am using Armitage in Kali Linux to check for vulnerabilities in ...
4
votes
2answers
496 views

I think my site was hacked. Can someone explain the “GET / HTTP/1.0” garbage in my Apache log, and what it's doing?

Please see below the log entry from the hack, I have decoded the base_64 code and ultimately some files are dropped onto the server and a directory listing becomes available among other niceties! ...
32
votes
10answers
7k views

Vulnerable OS's?

Which vulnerable OS's like for example DVL would you recommend for someone to use for the purpose of pentest/exploitation learning?
2
votes
1answer
115 views

Sqlmap, how to move forward? [duplicate]

So, I'm using Sqlmap for a while now to test the security for my company (we're too small to have IT guy and I'm the closest they got for now), I already managed to access the database remotely and ...
1
vote
1answer
39 views

What purpose is served by repeated connection resets?

My server logs are being filled with Connection Reset by xxx.xxx.xxx.xxx [preauth]: $ cat /var/log/auth.log | grep 'Connection Reset' Mar 13 19:52:30 server sshd[29366]: Connection reset by xxx.xxx....
0
votes
0answers
83 views

How can I partially overwrite the EIP in order to bypass ASLR?

As far as I know, it is possible to overwrite the unchanged part of the EIP to bypass ASLR protection. Unfortunately, I do not understand how this can help me in order to jump to the location of my ...
3
votes
2answers
158 views

My Apache server is regularly challenged with vulnerability attacks: Do I need to worry?

When I look into my access logs: I find a lot of suspicious activity that looks like attempts to gain administrative access to my system using vulnerabilities from known web software products such as ...
1
vote
0answers
62 views

Encrypted Malicious Traffic Database

I was working on a little research project to correctly identify the encrypted traffic pattern generated by various tools/applications for example metasploit (or increase the success rate). I have ...
1
vote
1answer
50 views

How do you remotely BOF without knowing source code? [closed]

I have two questions. Note that I have very basic understanding of how BOF works, but don't know the exact mechanism or anything beyond what an ordinary computer user knows. My understanding of BOF ...
0
votes
0answers
26 views

GDB trace questions regarding register overflow. Anybody can explain it?

GDB Traces on x64 machine (gdb) disassemble main Dump of assembler code for function main: 0x000000000040050c <+0>: push %rbp 0x000000000040050d <+1>: mov %rsp,%rbp ...
0
votes
1answer
197 views

Does it Matter That Universal Windows Platform (UWP) is Open to Phishing Attacks?

A few years ago (a little over three now to be exact), I brought up what I consider to be a rather obvious (and serious) security issue with the Universal Windows Platform (UWP): The ability to use ...
-4
votes
1answer
122 views

How is it technically possible for Apple to unlock the San Bernardino shooter's iPhone? [duplicate]

If the iPhone of the San Bernadino shooters is locked, how would it even be possible for Apple to acquiesce to the FBI's request for them to unlock the phone? Does that mean Apple has some kind of "...
1
vote
1answer
105 views

Exploit Stack Based buffer overflow (x64) while controlling rbx register

I can control these registers: (gdb) i r rax 0x1 1 rbx 0x4141414141414141 4702111234474983745 rcx 0x7ffff760cf90 140737343704976 rdx ...
8
votes
0answers
633 views

Heap Buffer Overflow - AddressSanitizer output - what is needed to exploit this condition?

This is the AddressSanitizer output, for different input I get READ and WRITE errors. From Heap Buffer Overflow perspective which are more interesting? I want to execute my shellcode. Can somebody ...
31
votes
2answers
4k views

Where to report malicious URLs, phishing, and malicious web sites?

I recently discovered that my web site was hacked: there was a hidden HTML div that's about selling shoes...! I googled the text in question and voila: thousands of sites have been hacked. Check this ...
1
vote
1answer
99 views

Controlling where a program crashes

I'm missing a part of the process for preparing a payload for an overflow exploit. To crash a program using an overflow vulnerability, lets say the heap. How can we control the memory address it ...
-1
votes
2answers
81 views

Guidance towards exploit development and exploring codes [closed]

I am familiar with intel assembly ,c programming ,perl and linux kernel internals. I want to explore more through fuzzing , analyzing source code and developing exploits as well as proper safety ...
2
votes
2answers
111 views

why can't i overwrite stack frame

I'm currently reading Gray Hat Hacking The Ethical Hacker's Handbook, Fourth Edition and I have a question with an exercise in the book. The lab "Lab 10 - 1 Overflow of meet.c" is a lab in which we ...
12
votes
5answers
2k views

Unknown process on my ubuntu machine communicating over multiple ports with UDP proto

I have a Django web application where the web app and the postgresql database are hosted on two separate Ubuntu-based machines. On my Database machine (and not my web application), if I run sudo ...
3
votes
0answers
24 views

using “mount -o bind” in chroot

I have to provide a few, reasonably complete, chrooted ssh accesses to a very small system where disk space is at a premium. I was considering doing something along the lines: mkdir -p newroot/usr ...
2
votes
3answers
87 views

Can a curl request to an arbitrary url made sufficiently safe?

This is a follow up of another topic (Is allowing unfiltered curl request from a website a vulnerability?) on which I am doing some private research. Given: A publicly reachable webservice that ...
31
votes
3answers
14k views

How do you stop a hacker when their IP address is 0.0.0.0?

Wordfence reports the following visitor: An unknown location at IP 0.0.0.0 visited 4 hours 45 mins ago IP: 0.0.0.0 Browser: Baiduspider version 2.0 Mozilla/5.0 (compatible; Baiduspider/2.0; +http:/...
3
votes
2answers
87 views

Making a file immutable (against kernel exploits)

I'd like to know how to make files completely immutable. "Completely" refers in this case to: immutable while the system is running. I could live with something like physical access where someone e.g ...
0
votes
2answers
49 views

Need some help on Wordpress issue

When I am accessing my Wordpress website, for example: https://example.com/wp-admin/admin-ajax.php?action=revslider_show_image&img=../wp-config.php it's returning a page containing zero. Is ...
2
votes
1answer
197 views

Return-to-libc attack with the argument read from registers (EDI/RDI)

I've read that to make a successful return-to-libc attack, the attacker should store the address of the command (for example /bin/sh) in the stack exactly after the return address of the system ...
3
votes
1answer
134 views

return-to-libc attack

I was trying to attempt at return-to-libc buffer overflow attack for my Computer Software Security assignment. As far as my understanding goes, we can do these kind of attacks regardless of stack ...
122
votes
14answers
39k views

What “hacking” competitions/challenges exist? [closed]

I have always enjoyed trying to gain access to things I'm not really supposed to play around with. I found Hack This Site a long time ago and I learned a lot from it. The issue I have with HTS is that ...
51
votes
2answers
29k views

How do ASLR and DEP work?

How do Address Space Layout Randomisation (ASLR) and Data Execution Prevention (DEP) work, in terms of preventing vulnerabilities from being exploited? Can they be bypassed?
5
votes
2answers
2k views

Exploiting a PHP server with a .jpg file upload

I would like to ask a question regarding the classic uploading an image and executing php code exploit on a website. So I have been trying out this exploit a website I'm supposed to hack (It's set up ...
0
votes
2answers
194 views

Computer Security vs Privacy

Probably this is a redundent post but in fact I have been searching online about a precise clear distinction between computer security and privacy. I'd like to know the difference of between them ...
0
votes
1answer
35 views

Exploit by overwriting relative address?

I see a lot of exploits overwrite an absolute address to gain code execution. I wonder if there are vulnerabilities which offer the possibility to overwrite relative addresses. Can you imagine a ...
4
votes
3answers
212 views

How often do high-end attackers actually use zero-day exploits?

Earlier this week the head of the NSA's Tailored Access Operations unit rather remarkably gave a presentation at the USENIX Enigma security conference. (News coverege here and here; video of the talk ...
3
votes
2answers
140 views

metasploit exploits and payloads documentation

Where can i found the documentation of the exploits and payloads available in metasploit. I am looking for a documentation that tells what does the exploit or the payload do, and possibly a ...
1
vote
2answers
2k views

What makes an Android application vulnerable to SQL Injection?

Definition of SQL Injection SQL injection is a code injection technique, used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g....
1
vote
2answers
719 views

Bridge Exploit of Network Multi-function Print/Fax Devices

I performed a recent security audit and was wondering if anyone has heard or run across any known exploits against any commercial multi-function print/scan device whereby you can bridge the incoming ...
2
votes
2answers
5k views

Create netcat listener and execute reverse shell in the same script

I'm coding an exploit in python that exploits a command injection vulnerability for a CTF and I'm wondering how could I start a netcat listener and then send the payload to the remote host and once ...
0
votes
0answers
52 views

Encode metasploit

Using metasploit I generated an exploit exploit/windows/fileformat/ms14_017_rtf for windows 7 with windows/shell_reverse_tcp payload. In show advanced, I use option EnableContextEncoding true and it's ...
1
vote
0answers
92 views

How to exploit a stack-overflow without setting -mpreferred-stack-boundary=2

I have been playing with some wargames and I ported some of then on my Linux machine as well. I noticed that when not using -mpreferred-stack-boundary=2, gcc might compile "main" with an interesting ...
3
votes
1answer
690 views

Is my server vulnerable to a perl exploit?

I have a few worrying entries in my web server logs and I'm wondering if this means that my server is vulnerable. Firstly, the following seems to fail, receiving a 404 response: [15/Jan/2016:10:27:...
126
votes
5answers
5k views

How can I protect myself from this kind of clipboard abuse?

Clipboard abuse from websites Many websites use JavaScript or CSS to stealthily insert or replace text in the user's clipboard whenever they copy information from the page. As far as I know this is ...
3
votes
1answer
162 views

CVE-2015-4852: Infected traffic pattern

Assuming that my Weblogic server is compromised by this vulnerability, what would the traffic pattern look like? I'm assuming I would see HTTP requests attempting to make connections directly from ...