Ruby on Rails: ActiveStorage direct upload fails to sign content-length header for S3 service

When a user makes a direct upload using ActiveStorage, the browser makes a request to the DirectUploadsController containing the directupload parameters filename, contenttype, bytesize, and checksum. These are used to generate a presigned url that is then passed back to the browser, allowing the...

HackerOne: ActiveStorage throws exception when using whitespace as filename, may lead to denial of service of multiple pages

Summary: Hi team, I've found an issue on the profile picture upload feature of your asset - https://hackerone.com, which can allow a malicious attacker to perform an application wide denial of service attack. Description: I was playing with the profile picture upload feature, then i observed that...

Ruby on Rails Active Storage Insecure Deserialization (CVE-2019-5420)

An insecure deserialization vulnerability exists in Ruby on Rails' ActiveStorage component. Successful exploitation of this vulnerability could allow a remote authenticated attacker with at least author-level privileges to execute arbitrary code on the affected system...

[SECURITY] Fedora 30 Update: rubygem-activestorage-5.2.3-1.fc30

Attach cloud and local files in Rails applications...

Fedora Update for rubygem-activestorage FEDORA-2019-1cfe24db5c

The remote host is missing an update for the SPDX-FileCopyrightText: 2019 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Fedora Update for rubygem-activestorage FEDORA-2019-307ebe924c

The remote host is missing an update for the Copyright C 2019 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

[SECURITY] Fedora 29 Update: rubygem-activestorage-5.2.1-3.fc29

Attach cloud and local files in Rails applications...

GHSA-7RR7-RCJW-56VJ Exposure of Sensitive Information to an Unauthorized Actor in activestorage

A bypass vulnerability in Active Storage = 5.2.0 for Google Cloud Storage and Disk services allow an attacker to modify the content-disposition and content-type parameters which can be used in with HTML files and have them executed inline. Additionally, if combined with other techniques such as...

Cross-Site Scripting (XSS)

activestorage is vulnerable to cross-site scripting. Signed download URLs that are generated for Google Cloud Storage include content-disposition and content-type parameters which can be modified on the client-side. This allows an attacker to upload specially crafted HTML files and inject arbitra...

Ruby on Rails: ActiveStorage service's signed URLs can be hijacked via AppCache+Cookie stuffing trick when using GCS or DiskService

ActiveStorage tries to force content-disposition: attachment for a list of content-types, including text/html. However, response-content-type and response-content-disposition in GCS and DiskService's URLs aren't signed, which means an attacker can modify them at will. This is not the case for Azu...