This blog post explores how the zip file format can be exploited and shares the solution the CrowdStrike team came up with.
Secure coding technique: Default behavior of Zip libraries can lead to Remote Code Execution - Blog
This week we are going to talk about the default behavior of Zip libraries. If you are an application developer, it is very likely that you have used this before. Most resources that are downloaded over the internet are in zip format, this makes sense; compressed data is smaller, so it downloads faster and consumes less bandwidth.
Zip Path Traversal | Security | Android Developers
The Zip Path Traversal vulnerability, also known as ZipSlip, is related to handling compressed archives. On this page, we demonstrate this vulnerability using the ZIP format as an example, but similar problems can arise in libraries handling other formats, like TAR, RAR, or 7z.
Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)
### Summary A path traversal vulnerability in pnpm's binary fetcher allows malicious packages to write files outside the intended extraction directory. The vulnerability has two attack vecto...
Crowdmatching for Public Goods — Snowdrift.coop
We support works that everyone can use, adapt, and share freely. But as public goods, anyone can freeride. And that presents a dilemma in getting funded. Our innovative platform brings people together to address this problem.
anthropic-experimental/sandbox-runtime
A lightweight sandboxing tool for enforcing filesystem and network restrictions on arbitrary processes at the OS level, without requiring a container.
Zip Slip, Path Traversal Vulnerability during File Decompression - ASEC
Zip Slip, Path Traversal Vulnerability during File Decompression ASEC
Overview | Safebucket
Safebucket is an open-source file sharing platform where files never touch your
Send files anywhere | Frictionless, Fast, Private, Unlimited and Free
AltSendme is a frictionless peer-to-peer file transfer cross-platform desktop application. Open-source blip-alternative, Available for Windows, macOS, and Linux.
Permissioned Data Diary 2: Buckets - Daniel's Leaflets
The second in a series of posts building up a solution to permissioned data on atproto. We introduce buckets: a new protocol primitive for creating a shared social context.
Akhilesh Thite (@akhileshthite@mastodon.social)
Attached: 1 image Yesterday my Spotify subscription expired, and instead of renewing, I finally moved on. But downloading 500+ songs manually is hell, so I built ZipifyTunes; a simple tool that converts any playlist CSV into MP3s with album art + metadata! Now I’m listening offline again on my iPod Nano 5th gen and loving it. And with @peersky I can even upload the ZIP to IPFS or Hypercore and stream my songs from public gateways on my phone. If you want to save hours of work, try it: https://github.com/akhileshthite/zipify-tunes
CCFS cryptographically curated file system
The Internet was originally designed to be a next-generation phone system that could withstand a Soviet attack. Today, we ask the Internet to perform tasks that no longer resemble phone calls in the face of threats that no longer resemble Soviet bombardment. However, we have come to rely on names that can be subverted at every level of the stack or simply be allowed to rot by their original creators. It is possible for us to build networks of content that serve the content distribution needs of today while withstanding the hostile environment that all modern systems face. This dissertation presents the Cryptographically Curated File System (CCFS), which offers five properties that we feel a modern content distribution system should provide. The first property is Strong Links, which maintains that only the owner of a link can change the content to which it points. The second property, Permissionless Distribution, allows anyone to become a curator without dependence on a naming or numbering authority. Third, Independent Validation arises from the fact that the object seeking affirmation need not choose the source of trust. Connectivity, the fourth property, allows any curator to delegate and curate the right to alter links. Each curator can delegate the control of a link and that designee can do the same, leaving a chain of trust from the original curator to the one who assigned the content. Lastly, with the property of Collective Confidence, trust does not need to come from a single source, but can instead be an aggregate affirmation. Since CCFS embodies all five of these properties, it can serve as the foundational technology for a more robust Web. CCFS can serve as the base of a web that performs the tasks of today’s Web, but also may outperform it. In the third chapter, we present a number of scenarios that demonstrate the capacity and potential of CCFS. The system can be used as a publication platform that has been re-optimized within the constraints of the modern Internet, but not the constraints of decades past. The curated links can still be organized into a hierarchical namespace (e.g., a Domain Naming System (DNS)) and de jure verifications (e.g., a Certificate Authority (CA) system), but also support social, professional, and reputational graphs. This data can be distributed, versioned, and archived more efficiently. Although communication systems were not designed for such a content-centric system, the combination of broadcasts and point-to-point communications are perfectly suited for scaling the distribution, while allowing communities to share the burdens of hosting and maintenance. CCFS even supports the privacy of friend-to-friend networks without sacrificing the ability to interoperate with the wider world. Finally, CCFS does all of this without damaging the ability to operate search engines or alert systems, providing a discovery mechanism, which is vital to a usable, useful web. To demonstrate the viability of this model, we built a research prototype. The results of these tests demonstrate that while the CCFS prototype is not ready to be used as a drop-in replacement for all file system use cases, the system is feasible. CCFS is fast enough to be usable and can be used to publish, version, archive, and search data. Even in this crude form, CCFS already demonstrates advantages over previous state-of-the-art systems. When the Internet was designed, there were relatively fewer computers that were far weaker than the computers we have now. They were largely connected to each other over reliable connections. When the Internet was first created, computing was expensive and propagation delay was negligible. Since then, the propagation delay has not improved on a Moore’s Law Curve. Now, latency has come to dominate all other costs of retrieving content; specifically, the propagation time has come to dominate the latency. In order to improve the latency, we are paying more for storage, processing, and bandwidth. The only way to improve propagation delay is to move the content closer to the destination. In order to have the content close to the demand, we store multiple copies and search multiple locations, thus trading off storage, bandwidth, and processing for lower propagation delay. The computing world should re-evaluate these trade-offs because the situation has changed. We need an Internet that is designed for the technologies used today, rather than the tools of the 20th century. CCFS, which regards the trade-off for lower propagation delay, will be better suited for 21st-century technologies. Although CCFS is not preferable in all situations, it can still offer tremendous value. Better robustness, performance, and democracy make CCFS a contribution to the field. Robustness comes from the cryptographic assurances provided by the five properties of CCFS. Performance comes from the locality of content. Democracy arises from the lack of a centralized authority that may grant the right of Free Speech only to those who espouse rhetoric compatible with their ideals. Combined, this model for a cryptographically secure, content-centric system provides a novel contribution to the state of communications technology and information security.
Feridinha - Free File Upload
Upload files for free with Feridinha — a fast and secure file upload service.
Rethinking Digital Commons in the Age of Viral Hate
Hate has a significant advantage on social networks: its ability to go viral. The case of Luigi Mangione, the alleged murderer, urgently calls for a rethink of digital commons.
Unlicense Yourself: Set Your Code Free
An initiative to help software developers waive their copyright and dedicate their work to the public domain by offering a standard template and process for disclaiming copyright interest in software, both for original authorship and for contributions.
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