- PERL IMAGE EXIFTOOL DATE MODIFIED HOW TO
- PERL IMAGE EXIFTOOL DATE MODIFIED PDF
- PERL IMAGE EXIFTOOL DATE MODIFIED MP4
- PERL IMAGE EXIFTOOL DATE MODIFIED INSTALL
- PERL IMAGE EXIFTOOL DATE MODIFIED PATCH
You can install ExifTool on Ubuntu using the apt utility. In this section, we'll be installing ExifTool on Ubuntu and other Linux distributions On Ubuntu
Modify the required parts of the commands used in this article to make your work. I'll be using CR2 (Canon raw files) format in this article, and that's perfectly fine.
PERL IMAGE EXIFTOOL DATE MODIFIED HOW TO
Also, if you need to quickly and safely copy, move, rename, extract previews or modify multiple images at once, ExifTool is what you need.īy the end of this article, we'll know how to install ExifTool on Ubuntu / CentOS and manipulate metadata of files. For example, the metadata of photographs are the additional data like the name of the device, the resolution of the image, the location the image was taken at, the date of capture and modification and more.ĮxifTool supports several metadata formats including EXIF, GPS, XMP, GeoTIFF, Photoshop IRB, ID3, FlashPix. Your camera writes EXIF (Exchangeable image file format) and we'll be focusing on images in this article, but note that ExifTool can be used to modify the metadata of any file. Metadata are the additional data added to multimedia files.
PERL IMAGE EXIFTOOL DATE MODIFIED PDF
It's a open source program for reading, modifying, and manipulating images, videos, audios and PDF metadata. If you want to try it out, you can access the lab source code and a python script that automates the exploit creation in our repository.You may have come across ExifTool while searching for an image recovery software. With this, this API could be exploited when reading the image on the parameter endpoint : In the date that this article was written, the official Exiftool lib on CPAN (Image::ExifTool) was still vulnerable. My $informations = $exifTool -> ImageInfo("files/$generate") ĭate => $informations -> , My $path = Mojo::File -> new("files/$generate") My $generate = create_uuid_as_string(UUID_V4) My $getContent = $userAgent -> get($endpoint) -> result() My $userAgent = Mojo::UserAgent -> new() If (($endpoint) & (length($endpoint) new($endpoint) My $endpoint = $request -> param("endpoint") A toolkit for DjVu file manipulation.We will also use the tool bzz to compress our payload, then it will not be easily visible in the DjVu file. To create this valid DjVu file, we used the tool djvumake, from the djvulibre toolkit.
To trigger the vulnerable function, we need to create a valid DjVu file that contains an annotation chunk with the payload that will be executed by the eval function as Perl code. This is done because this content is then use in a eval function in line 34, that executes the content as code. Path: exiftool/lib/Image/ExifTool/DjVu.pmIt’s possible to see that the vulnerable version does a verification on line 31 that is responsible to remove the attributes that uses $ (Perl variables) or (Perl arrays), to have some security sanitization. Then download the vulnerable version 12.23, and could see in the source code the vulnerable function:
PERL IMAGE EXIFTOOL DATE MODIFIED PATCH
The vulnerability happens when Exiftool tries to parse the DjVu filetype, more specifically the annotations field in the file structure.To analyse it, let’s first checked the fix patch in the Exiftool project on Github: Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the malicious image." We have a strong hint of where to begin looking for the problem, when we read the CVE description: His article about the exploit can also be found listed in the References. We would also like to thank for the help he gave us that has contributed to make this exploit possible.
PERL IMAGE EXIFTOOL DATE MODIFIED MP4
Īnyone using ExifTool make sure to update to 12.24+ as CVE-2021-22204 can be triggered with a perfectly valid image (jpg, tiff, mp4 and many more) leading to arbitrary code execution! /VDoybw07f5- William Bowling April 24, 2021 The author recently wrote a detailed write-up about the process and you can find this material in the reference links. This article was made to show our study process of the CVE to make a reliable exploit for it. We choose this CVE to our study because it was found in a high impact program, and by the date that we began the process there was no public exploit available. You can listen to the audio version of this blogspot:Įxiftool is a tool and library made in Perl that extracts metadata from almost any type of file. This vulnerability was found in the Gitlab bug bounty program, where they use this tool as dependency for their product. Recently, the researcher wcbowling found a vulnerability in the Exiftool tool, that enabled a malicious actor to perform a Remote code Execution attack.
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