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Questions tagged [vulnerability]

A weakness or flaw in computer software and hardware which allows an attacker to take advantage of (exploit) a targeted system.

0
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1answer
86 views

Is it possible to get data from database server if you are on the application server?

For example, You are attacking an application that employs two different servers: an application server and a database server. You have discovered a vulnerability that allows you to execute arbitrary ...
3
votes
2answers
354 views

How do hackers find vulnerabilities in closed source operating systems?

I'm not planning on hacking anything, but I'm just wondering how hackers find vulnerabilities in closed source operating systems such as Windows, since they don't know exactly what the code is doing? ...
1
vote
1answer
205 views

What are good, safe, not necessarily anonymous ways to disclose vulnerabilities?

Let's assume you stumble across a vulnerability in some online system, which is a commercial product by a small US company (1 to 50 employees according to Glassdoor). That online system shall be ...
0
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0answers
105 views

Dirty ajax calls allows me to get free pizza [duplicate]

Recently my buddy at work wanted to order some food for lunch from a website that we usually order from. The site allows the visitor to become a member of the site by registering and then logging in. ...
0
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1answer
94 views

Server vulnerability scanning [closed]

How can I discover server vulnerabilities without using a scanning software such as openVas? is there any manual ways or steps to follow to assure server security. Thanks in advance
63
votes
1answer
6k views

Who “brands” vulnerabilities?

It appears that every time there's a vulnerability discovered major enough to hit the news, its been assigned a brand name and often even a logo. Heartbleed, Spectre, Meltdown, Foreshadow, etc. Who ...
2
votes
0answers
104 views

How to extract the information about the stack or EIP/RIP registers from the ASAN (sanitizer) crash output?

I am testing Netwide Assembler(NASM) and verifying the latest bug [CVE-2018-10254] Stack-buffer-overflow (out of bound read). I am trying to overwrite the EIP/RIP and make it crash but I don't know ...
0
votes
1answer
252 views

The older the Linux kernel is, the more secure?

Are there security benefits running Linux Distro base on an older version of Linux kernel? Security benefits = fewer vulnerabilities that can be exploited by hackers. Linux Distro base on older ...
1
vote
1answer
115 views

SSRF when user input is appended to hostname

Is it considered a SSRF vulnerability (or is it dangerous at all) if the backend of an application fetches a URL that is somewhat based off of user input, in a way similar to this get("https://...
1
vote
3answers
337 views

Is it possible to hack into secured wifi and download with bit torrent from my IP address?

Is it possible to hack into secured wifi and download using BitTorrent from my IP address? I live in Denmark- if that makes any difference. We changed to a new WIFI service provider a few years back (...
0
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0answers
76 views

Why 6.7 version of image magick can be exploitable even it is Vulnerable version?

I have installed a vulnerable version of the image magick i.e. 6.7 and according to this CVE-2016–3714 it is a vulnerable version. Now why I downloaded it because to get a clear picture of this ...
2
votes
1answer
340 views

What is NetSpectre?

A new attack was revealed in a document titled NetSpectre: Read Arbitrary Memory over Network (PDF warning). I've seen a few non-technical writeups about the fact that it's a pretty slow attack: ...
4
votes
2answers
221 views

Security of WWAN cards in laptops

I'm thinking about buying a WWAN card for my laptop (like this one here), as it is more convenient to use than USB tethering. However, I'm concerned about the security risk that comes with such a card ...
3
votes
1answer
393 views

strstr and fopen, is there a bypass?

I have a binary that does this: if (strstr(USERCONTROLLERSTRING, "..")) exit; fopen(CurrentPath+"\\Data\\"+USERCONTROLLEDSTRING, "r"); then spits out all the content of the file. Is there any ...
13
votes
6answers
8k views

What pages are vulnerable to SQL injection?

I believe I understand the basics of SQL injection. I also know using prepared statements with PHP files is the best way to prevent SQL injection. I was always told that SQL injection happens most ...
3
votes
1answer
114 views

Exploit user input being directly inserted into PDF

I'm testing a web application where user input is directly inserted into a PDF file which can then be downloaded. The user input is accepted as is, without encoding or any other modification. This ...
-1
votes
2answers
97 views

Extracting passwords from recycled machine using Spectre and Meltdown

With Spectre and Meltdown, hackers can extract your password from the CPU cache. If I give someone my computer without the hard drive, can he extract my passwords through the CPU?
1
vote
1answer
48 views

Incomplete Data In Format String Dump

I've been practicing format-string attacks lately and I thought I knew how it works but after hours of research I did not manage to get the expected results. I made a sample program which has a ...
-2
votes
1answer
312 views

How to secure PHP code for uploading avatar images?

I can bypass an avatar upload image verification process and upload a PHP file or any other extension binding a valid jpeg image. This is the code: if ($image->valid()) { $mimeType = $...
1
vote
1answer
246 views

Are the details about the Widevine bug now public?

There was a bug in Widevine last year which enabled downloading Encrypted Media Extension Content. They stated that they would give full details after 90 days. Was this meant for public disclosure or ...
-1
votes
1answer
267 views

Secure version of httpd package [closed]

I am using Linux xyz.co 3.10.0-514.21.1.el7.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux Tried to install latest version of httpd which is 2.4.33. But it is not available for RHEL7. That's why I ...
1
vote
0answers
130 views

Is there any modern scalable way to do system call monitoring?

I wrote a kernel module to replace the Linux kernel service routines (e.g. system calls) with security-enforcing code, similar to SELinux or AppArmor, with the main exceptions of ruleset control on-...
1
vote
2answers
678 views

Execute an uploaded php script on a vulnerable server if I know it's location? [closed]

I need to test a website and I found a vulnerable file upload. It is only checked whether or not the file extension is .jpg, .png or .pdf. I can bypass this by uploading a file named script.php.jpg. I ...
1
vote
1answer
190 views

Could you use svchost to run any service?

Is it possible if per say you installed an "evil_service," to use svchost to run it? Will it run any service?
2
votes
1answer
113 views

How can an old hardware lead to a security failure?

I am working on critical cyber physical systems, and my work and research lead me to some questions. In the following, I assume that the attacker is not able to change the hardware of your system and ...
1
vote
0answers
84 views

Windows Possible Vectors for Privilege Escalation From “Weak” Folder ACLs

I am doing a security analysis and I am trying to figure out what the possible attack vectors and possibility of privilege escalation's are of the way this program is setup? I used Attack Surface ...
3
votes
0answers
186 views

Cortana password bypass CVE-2018-8140

Recently a vulnerability in Microsoft's Cortana (CVE2018-8140) has been patched. Mcafee made a blog post about it explaining some background information. There is also a video showing a Proof of ...
0
votes
1answer
596 views

How to Check Open Source Code for Vulnerabilities? [closed]

I am a member in bug bounty platform. There are some programs that make their source code available to the hackers to find vulnerabilities. For example, their PHP, JS, C++, or ruby code. I want to ...
3
votes
1answer
431 views

Why aren’t collisions important with HMAC?

SHA-1 is broken because collisions can be found in substantially fewer hash operations than naive brute-force would suggest. HMAC-SHA1 is fine, however, because for HMAC “collisions aren’t important.” ...
5
votes
3answers
2k views

Is the Linux kernel vulnerable to LazyFP (CVE-2018-3665)?

Recently, a side-channel attack was discovered that exploits lazy FPU state switching to leak the contents of MMX, SSE, and AVX registers. The vulnerability can only be exploited when lazy FPU saves ...
1
vote
0answers
42 views

A database query error in Wikimedia 1.27.4

I have a website running Wikimedia 1.27.4 , When I insert (--) symbol in search box I get this error message A database query error has occurred. This may indicate a bug in the software. I got some ...
4
votes
1answer
319 views

Possible SQL injection vulnerability?

I'm a developer and I'm creating a script to interface with game servers to update player stats. I was sending a POST request with multipart form data and on the last boundary accidentally had the ...
2
votes
0answers
80 views

Security issue found in login system no resolved. Next Step?

Approximately 8 months ago I found and reported a serious security issue surrounding a website I use. This website holds confidential and protected personally identifiable information. I called the ...
4
votes
1answer
75 views

How is this registration setup vulnerable?

I'm developing a mobile app for iOS and Android that has, due to specs that are given by management, some security flaws. However, I can't quite explain in concrete business speak why the specs are ...
3
votes
2answers
276 views

What is the attack surface on a L2 switch?

I'm trying to figure out what makes a "top brand" switch better than a "cheap unknown brand" one with the same features. I often see security thrown in the mix, but really can't understand how this ...
2
votes
0answers
164 views

How does biometric authentication work from a technical perspective?

Together with a colleague, we discussed the way of biometric authentication and how this works out. Both of us are only interested in security but far from being an expert on the technical side. ...
1
vote
1answer
698 views

How to prevent persistent XSS vulnerability with the Java Struts 1 Framework?

I have an application that executes under Tomcat 7, developed with Struts (Java Web Framework). My application contains a security vulnerability (XSS Cross-site scripting). What kind of XSS ...
1
vote
1answer
799 views

Dealing with NULL byte (0x00) in offsets

I'm trying to exploit a strcpy() buffer overflow vulnerability to test ROP attack. I found a very useful gadget at address 0x0000f26c so I am obliged to insert null bytes to the stack to override the ...
0
votes
2answers
520 views

Source Code analysis tools available? [closed]

In the near future I have to check the source code of a web application on security vulnerabilities. The web application mainly consists of PHP files and contains more than 300 files. Do you know ...
5
votes
1answer
68 views

What are the EFAIL “backchannels in email clients not related to HTML”?

The published examples for exploiting the EFAIL email encryption vulnerability all appear to use HTML to create a backchannel for exfiltrating decrypted data. However, the homepage of EFAIL, https://...
0
votes
1answer
235 views

What is the attack vector for CVE-2018-3639 Speculative Store Bypass?

We use Web Application deployed on a CentOS server. Can the attack will be performed via a browser? Or the attacker need a physical access to the CentOS server? I cannot understand the attack vector ...
0
votes
0answers
62 views

Is it inherently insecure to fetch HTML and JS content from server and attach it to an existing HTML node (while executing all scripts)?

Two ways to develop a web app: Either the "classical" way, completely reloading the page with each request, or the "API" way, that is make the server only send JSON data and make the client fetch it ...
7
votes
1answer
165 views

How to be taken seriously when doing responsible disclosure?

Last week while reading an article on a website the URL ending in .php?id=1 it just asked to be tested for SQLi. When I confirmed that it was vulnerable I also found out that there was no user input ...
9
votes
5answers
670 views

How to find out what vulnerabilities X product has had/has?

Canonical question regarding the best way of obtaining information on what vulnerabilities X product has had/has. Other identical or significantly similar questions should be closed as a duplicate of ...
6
votes
1answer
99 views

How does ROCA affect Windows secure boot?

I've been doing some research on the Infineon vulnerability known as ROCA over the last few days. As I understand it, the vulnerability is present when a TPM running vulnerable firmware generates an ...
11
votes
3answers
697 views

How can malware immediately infect a Windows XP computer as soon as it goes online without any user action?

This is a thing I used to hear back in the olden days of Windows XP... People were telling me that a computer running on an out-of-date Windows XP system with no antivirus software was getting ...
1
vote
1answer
202 views

What approaches are used to discover zero-day vulnerabilities?

As a developer of multiple standalone apps (Web-/Native apps) I am wondering, what things I should keep in mind / what are typical approaches of a blackhat (besides of these scriptkiddies checking for ...
1
vote
0answers
522 views

How did I got hacked? [closed]

What happened: Event 1 A few months ago I was working on my laptop (laptop1). During my activities, sometimes I saw a text selection, when moving my mouse. I thought this happend due to a bad key. ...
1
vote
1answer
102 views

Why is CVE-2017-5461 rated Critical with CVSS Score 9.8?

A while ago I came across this CVE-2017-5461, which is rated 9.8 both on NVD and Redhat Portal, with a CVSS base string of CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H for those who is not very ...
0
votes
1answer
60 views

If the browser enforces a Sandox, then why the infections by malware?

By design the browser enforces a Sandbox, but we know that Javascript which runs inside this sandbox can be used to do malware damage etc.Isn't the sandbox supposed to protect against it as well as ...