Questions tagged [image]

For files or formats containing a digital representation of a graphical picture. Not to be confused with [disk-image] or forensic images.

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84 views

Create memory image of infected machine without risk

I am pretty new in the security world and I am writing a procedure on how to create a memory image of an infected machine for forensics. The problem is that the machine does not have the tools for ...
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How to secure container to prevent sensitive information leak? [duplicate]

So I have to deploy a container containing the backend into the clients network, (they have policies about data not leaving premise). But how do i secure my container to prevent the client from ...
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2answers
103 views

Clonezilla for forensic disk image

I was wondering if it's reasonable and forensically correct to use Clonezilla for the image of an attacked machine. Since some of the commercial products are very expensive I'm turning to open source ...
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1answer
57 views

Can display a GIF in <img> tag causing Client-side DOS

SVG image can be used in DOS user browser with billion laugh attack. Can we do the same with other image types? especially GIF? Thanks everyone.
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105 views

Is is safe to skip virus scanning for image files?

Among other things, I use clamscan on my web servers website directories to help find compromised websites. Unfortunately the time to do this scan is becoming onerous. Are there any good reasons not ...
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Is it possible for someone to “peel back” an image layer? [duplicate]

I am on a Windows 10 machine using Chrome (latest updates). I took a screenshot of Instagram, because I was having problems logging in, and then using Paint 3D applied a black rectangle to hide my ...
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.htaccess to stop scripts with image extensions

I use a .htaccess file in my images directory to block scripts from running. I exclude .php .cgi and so on. But some malware is disguised by naming them with an image extension. I did not previously ...
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1answer
49 views

Does limiting size of images prevents buffer overflow?

I am writing an app that serves images to clients. The app is written mostly in python. I store the images in AWS s3 and serve the clients them directly from there. Am I vulnerable to buffer overflow ...
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1answer
83 views

Virus scanning uploaded images to database

I have a database for a chat app to which users can upload images. These images get scanned before they are made available to other users in a conversation. But when the antivirus gets an update, ...
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1answer
228 views

CSP allowing Base64 encoded images without unsafe-eval

If I allow base64 encoded images to load on my website, but I do not have unsafe-eval enabled, nor have I allowed 'inline-script' would my site still be at risk by allowing base64 encoded image data ...
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65 views

Are any social media sites sanitizing images?

I'm new to steganography. I have some questions about images on social media sites. I saw that Facebook recently patched a vulnerability on Instagram, but I was wondering whether any of the major ...
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2answers
128 views

Are PPM or BMP images safer than JPEGs or PNGs?

I was reading this question ( How to check if an image file is clean? ) and forest's answer suggested converting the image to a "trivial pixelmap format, such as PPM". Such a format was ...
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45 views

Recovery files fails Raspberry Pi 3b

i am trying to learn something about computer security, I decided to start from the linux world, through raspberry p3 with raspbian jessie OS I would like to start with forensics file management, and ...
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What aspects of image preparation workflows can lead to accidents like Boris Johnson's No. 10 tweet's 'hidden message'?

The BBC reports that the image Boris Johson posted on Twitter to congratulate Joe Biden contains traces of the text "Trump" in the background. The BBC article links to a Guido Fawkes' ...
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31 views

What can a jpg with a small width and height hide? [duplicate]

I'm new to cybersecurity. I am participating in the cybersec challenge. I have an image to analyze. This image is small but super heavy. I thought that there was a message hidden behind but all my ...
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1answer
256 views

Are preview thumbnails for links a risk?

I received a message from a friend with a link. I never clicked it, but the thumbnail image shown pretended to be an image preview for a YouTube video. Some of her other friends clicked it and it took ...
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1answer
430 views

How to detect malware in images

Do commercial AV suites examine image files (pictures) for potential malware that might be imbedded via steganography? Is this a concern for most? I deal with a lot of imagery data and am wondering ...
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2answers
263 views

Encrypt Text Message as Image

Is this a good idea to make the following text message encryption: accept text from the user 1 store the text into a document in the form of some handwritten font convert the document into an image ...
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1answer
632 views

SSRF Through Image Url

I am currently studying regarding SSRF. I noticed that an injection vector where SSRF might be present is always parameters that is related to url (Importing image using URL, others). I have ...
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2answers
2k views

If malware can be attached to an image file, then why aren't images a common attack vector?

For example, if someone uploads a malicious image on website like Instagram or Facebook, and then hundreds of people viewed this image, wouldn't that be an easy way to infect the devices of hundreds ...
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960 views

How can wkhtmltopdf be used without introducing a security vulnerability?

Background Per the project website, wkhtmltopdf is a "command line tool to render HTML into PDF using the Qt WebKit rendering engine. It runs entirely "headless" and does not require a ...
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0answers
335 views

File Upload Vulnerability SVG [closed]

I am currently doing a bug bounty program and was testing the company's file upload functionality. After meddling with the functionality for a while, I was able to change the extension of the uploaded ...
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3answers
175 views

Checking potentially infected photos for stegonography

A friend of mine has an old family PC with a bunch of important photos on it. Unfortunately, from what he told me, it seems like they have fallen victim to a tech support scam some five years ago, ...
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1answer
345 views

Screenshots and steganography, can malicious code in image be copied?

If you have an image that has malicious code written into it using steganography would a screenshot of that image have functional malicious code as well? Or does the recapture transform the image data ...
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Can using “Save Image As” on Google Images be dangerous? [duplicate]

The title says it all, I was wondering if some malicious code could be placed in the image file (the formats I am concerned with are JPEG, PNG and WEBP, basically the common formats available when you ...
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2answers
76 views

Can specific location be determined from an aerial image?

Let's say I share a screenshot of an area of interest (AOI) from Google Maps. Does that alone reveal the specific location of the AOI, even if it has no identifiers (roads, coordinates) on it? What if ...
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1answer
203 views

Triggering an XSS through a shortened URL?

I have this piece of HTML: <img src="image src" alt="{injectable}" title="{injectable}" border="0"> where {injectable} values correspond to the same input value that has to be 32 characters ...
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1answer
233 views

What steganographic techniques can I use in images that survive lossy compression?

Learning a bit about IT security, a segment of the material was the basics of steganography - specifically, hiding information in the lowest significance bits of images, and converting images into ...
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2answers
1k views

How can I recover steganographically hidden data from a photographic copy of the image? [closed]

I need to photograph an image containing a steganographically hidden message, then decode the stego content from the photograph without recourse to the original image data. Are there any steganography ...
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2answers
331 views

How do we secure image parsing libraries against buffer overflow?

New to buffer overflow through image parsing. How can one design a secure library that parses images, and ensure there are no security vulnerabilities in it? It is common knowledge that image parsing ...
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2answers
750 views

How can nginx run a file with jpg extension as a php file?

I have a follow up question on this answer about executing image files as php. The answer explains that nginx support virtual directories. One can run www.something.com/blan.php/one/two/3 and one/...
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1answer
338 views

Can I inject javascript into a page via image?

Like so. Can I inject javascript into image urls, like this? <img src="javascript:alert("haha! you are hacked!">
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3answers
558 views

Is a cryptographically signing camera possible?

What kind of digital / cryptographic signing would make it possible to create a camera that cryptographically signs the photos it takes so that the images can be verified to have been taken with that ...
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2answers
5k views

Is there a way to execute XSS in an HTML img tag with SVG?

Is there a working technique to execute XSS in modern browsers using a SVG file displayed on a web page with an <img src=""> tag? I know a way to execute without <script> tag, but I don't ...
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1answer
318 views

What are the security risks to displaying an image loaded over http in a page loaded over https?

I'm developing a PWA in which part of the app displays the content of emails to the user. However, many of the image URL's that are in the emails come from http domains, and therefore do not load in a ...
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1answer
158 views

What attacking vectors does “background-image” have

I have a web application that loads an image by URL and shows it with the style-tag (background-image). Users can link their image. Would it be possible for a bad actor to fake an image and inject ...
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1answer
159 views

Is it possible to retrieve embedded information in a printed image with steganography?

If I print the following noise texture image in which I've embedded some information with steganography, can I retrieve the information back or can I detect the information loss occurred due to ...
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1answer
47 views

Books on digital image encryption [closed]

I'm an applied mathematician that recently developed an interest in digital image encryption. Might there be a book or set of references that develops the theory of digital image encryption and ...
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1answer
2k views

How can I open a malicious image in whatsapp safely?

I have got an image send by whatsapp on my android tabled, which I only can see when I press the download icon. How can I see the image, without getting a virus when the image is malicious? Are ...
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1answer
103 views

Is there a security risk in using the same profile picture on different sites?

Well, the title basically says it. I'd suppose that using the same profile picture on unrelated sites would allow anyone to do a quick Google image search and therefore associate the profiles with ...
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2answers
308 views

Can you stop a BeagleBone from being imaged?

I am working on a group project to have encrypted data on a BeagleBone Black without WiFi (however we will be connecting it to the internet) where you have to type in a password to access it and if ...
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2answers
38 views

media uploads and social sites group privacy etc

On sites like Facebook etc. you have the ability to create "private" photo albums that are only shared with selected friends, similarly in Messenger you can upload an image just to a specific chat. ...
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1answer
179 views

Image upload meta information

I'm coding an app that allows registered users (anyone who registers) to upload images to my nodejs background (processing with sharpjs).. I remove the exif section of the image for security. However ...
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4answers
2k views

What information is embedded in a photo taken by camera or print screen?

I was told that it is possible to tell the coordinates where a photo was taken and the date and time it was taken. It is somehow embedded in the photo. I have three questions about this which are as ...
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3answers
258 views

Per-User Image DRM for Finding a Leaker? [duplicate]

I'm managing a client that distributes their users images and files through one source. My background is heavily in development as opposed to security, and I'm of course familiar with some tricks that ...
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0answers
393 views

PHP Upload-show images securely [closed]

I've read various posts about how letting users to upload files can create vulnerabilities to your website such as a user injecting php code in an image. So i've created a small test project where ...
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49 views

What source formats are affected by ImageMagick's vulnaribility caused by Ghostscript?

According to https://www.theregister.co.uk/2018/08/23/imagemagick_ghostscript/ ImageMagick's convertion to PDF of arbitrary (user-submitted) documents should not be used because of Ghostscript's ...
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7answers
24k views

If I know the CPU architecture of a target, can I send instructions embedded in an image?

Can I send instructions embedded in an image to a target, if I know his CPU architecture?
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2answers
3k views

What are the security concerns for base64 encoded JSON files? [closed]

In a REST API, I'd like to receive images as base64 encoded strings in a JSON objects fron user's post and save them to disk using node.js fs module. The request body are objects like: { file: '...
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1answer
547 views

Recovering hidden contents from a jpg picture [duplicate]

Is there any way someone could recover hidden text from a jpg. For example in the picture