Space bypass to exploit xss

I’m trying for executing a xss flaw. But the content that reflected in the browser was commented. So I tried to close the comment by –> but this become – ->. (A space Between – -) . I tried to bypass it by using null char or many other methods (encoding). Can anyone solve it?

How to use dirty cow exploit?

I got Sony m4 aqua with locked bootloader, android 6.01 and july 1 2016 security patch, no DM verity…
I would like to freeze few factory apps via adb’s pm disable command (or any other way possible).
I’ve tried to run “su pm disable package.name” but the su command is not recognized for some reason. I am Linux noob but I got android studio with SDK and NDK installed on lubuntu machine (got it also on win7 machine).
Can someone explain me the steps to take in order to gain root shell access with DirtyCow exploit (or any other way) to be able to freeze apps?

How does the Quick Study exploit work for a School Savant Arcanist?

I have an arcanist character with the School Savant archetype, which allows me to prepare an extra spell per level of the chosen school (Air in my case) but requires two preparation slots for a spell of the opposing school (Earth for me).

I also have the Quick Study Arcanist Exploit which lets me swap a prepared spell for a different spell in my spellbook.

The interaction of quick study with these school spells are not exactly clear. For example:

  • If I choose to replace a specific Air school spell that I prepared, am I restricted to choose another Air school spell as a replacement?
  • Can I replace a normal spell with an Earth school spell, thus bypassing the need for 2 “preparation slots” (or do I need to replace 2 spells perhaps, or something else)

So how does replacing prepared spells with Quick Study work when both specific school spells from School Savant and other spells are involved?

[SECURITY VULNERABILITY] Apache HTTP 2.4.17 to 2.4.38 Local Root Exploit

Apache has recently made an announcement, revealing a major security vulnerability/exploit where servers running in Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute arbitrary code with the privileges of the parent process (usually root) by manipulating the scoreboard. Non-Unix systems are not affected.

More Details:
https://httpd.apache.org/security/vulnerabilities_24.html

Update Your Systems!

For those running Apache to their servers, we’d recommend updating as soon as possible. To do this on a CentOS based server, simply run:

yum -y update

Servers running cPanel/WHM have already been automatically upgraded. Or if not, you can manually upgrade it by running:

yum -y update ea-apache24*

After updating Apache, you can verify your current Apache version by running the following command, which should read Apache 2.4.39 or higher.

httpd -v

Frequently Asked Question: Are servers running LiteSpeed Web Server affected?

No, it is not. This only affects servers running Apache version 2.4.17 to 2.4.38.

Prevent Handler From Starting On Exploit

Ok, I want to be able to start up my handler in the background, and then attack multiple targets without each exploit starting its on handler…

For instance, when I am attacking a target…

[*] Exploiting target 192.168.1.2 [*] Started reverse TCP handler on 192.168.1.1:4446 [*] 192.168.1.2:7001 - Sending handshake... 

I dont want the reverse TCP handler started when I exploit, I want to use a background TCP handler to catch all of the incoming shells if that makes sense…

And I will tell you why, right now, when I execute this exploit, it completes but no session is created, then 10 minutes later, a session will be created for a previous target while attacking another target, so I just want to do a catch all in the background, while I loop through my targets…

Is there anyway to do this?

Does *nix* utility exist which collectsand submits host info via curl to exploit db and returns list of potential vulns?

I am looking for a client side utility which collects data locally (versions, services, etc) and then submits the data to an exploit database. This should return a list of potential vulnerabilities. Ideally very current. I know there are services which you can do this with but thinking something very simple, open, and free here in terms of a shell script ideally.

Corelan free course / exploit development to modern exploit development

I am doing corelan course tutorial #2 . I am improving a lot quickly, but I would to know something about this course , I know it’s based on windows xp, but I am mixing a bit with windows 7 CVE stack overflows depending on the course. I finish the part from xp and I continue with windows 7 ,but the tecniques are the same, however this course covers stack cookies / dep / aslr / ROP / SafeSEH / SEHOP ,heap spraying (IE8) but I wonder how difficult will it be to move from this course to modern exploitation windows 7 to 8 to 10 and start hunting the hottest 0day available ?

What Exploit Are These User Agents Trying to Use?

I just looked at my user agent tracking page on my site (archived on Yandex) and I noticed these user agents. I believe they are an attempt to exploit my server (NGinx with PHP). The 1 in front of it is just how many times the user agent was seen in the NGinx log. These are also shortened user agents and not long ones like Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36. I no longer have access to the logs as I presume this occurred sometime in January or February (my oldest logs are in March and I created the site in January).

1 Mozilla/5.9}print(238947899389478923-34567343546345);{ 1 Mozilla/5.9{$  {print(238947899389478923-34567343546345)}} 1 Mozilla/5.9\x22{$  {print(238947899389478923-34567343546345)}}\x22 1 Mozilla/5.9\x22];print(238947899389478923-34567343546345);// 1 Mozilla/5.9\x22 

What exploit was attempted and how can I test to ensure these exploits are not usable?

Exploit Development – Bad chars

I’m learning exploit development and while writing an encoder i was wondering what was the root cause of “bad chars” ?

The only explaination i could think of is that, in the case of a buffer overflow, there are changes/operations being done on the buffer between the input and the moment i access it.

This explaination is way too vague to be correct, there must be an other reason for requiring only a small subset of characters in those cases.

I’d appreciate someone pointing me to a more satisfying answer. Thanks!

Cannot exploit stack-based buffer overflow with ASLR-disabled, since RSP differs heavily between executions?

I have made a little toy program, compiled with ALSR disabled, that I want to exploit using stack-based buffer overflow:

// gcc stackexec0x1.c -Wl,-z,execstack -no-pie -fno-stack-protector -o stackexec0x1  #include <stdlib.h> #include <stdio.h> #include <string.h>  #define SBUFSZ 0x100 #define LBUFSZ 0x800  int main(int argc, char* argv[]) {     char buf[SBUFSZ];     printf("# ");     fgets(buf, LBUFSZ, stdin); // exploit this!     printf("%s", buf);     return 0; } 

I can easily overwrite the return address, saved on the stack, with a custom one. However, between consecutive runs of the program, the RSP register differs:

0x7ffdc114dc88 0x7ffeb97d5668 0x7ffd48027798 0x7ffdbf2e9ea8 0x7ffe036a5d78 0x7fff40595998 

Computing the differences between the above RSP register values, one can see they are big. It would not be feasible put a NOP-sledge that covers most of them on the stack?

How can I conveniently choose a return address into the NOP-sledge + payload on the stack, so that it’s executed (with high probability), when the function returns?

checksec:

checksec stackexec0x1 [*] '/home/nlykkei/exploit-dev/stackexec0x1/stackexec0x1'     Arch:     amd64-64-little     RELRO:    Partial RELRO     Stack:    No canary found     NX:       NX disabled     PIE:      No PIE (0x400000)     RWX:      Has RWX segments