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Security Researcher

🐰
Joined September 2024
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New post: How much faster could FlashProve get from better kernels alone? 🕵️‍♂️ I think a defensible hard upper bound is ~2800 tok/s/gpu, but likely much lower in practice. Past that, the next OOM will likely have to come from optimizing the protocol itself. xn--2-kmb.com/how-fast-can-f…
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New research from Microsoft Research demonstrates that reprogramming just a few dormant neurons in an AI agent can create a backdoor that leaves the agent behaving normally until it hits a specific trigger. While the specifics of this threat are novel, the mitigation is not: Know where your model came from, and be smart about its permissions. Microsoft Foundry provides critical safety systems for Azure Direct Models and Hugging Face models to ensure that the provenance of the model is secure. Microsoft researcher @DimitrisPapail explains the measures that model hubs and vendors should take as well as mitigation strategies for enterprises and users. msft.it/6014ahp6e
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zer0luck retweeted
Based on our investigation so far, on November 9th an attacker gained unauthorized access to Initia’s infrastructure through a command injection attack with a compromised GCP key used for provisioning private nodes. This exposed environment variables, which allowed the attacker to access our GitHub and GCP accounts and obtain further credentials. With these credentials the attacker gained access to Anvil, the hosting platform used by rollups on Initia. Through this the attacker was able to validate forged IBC withdrawals from five rollups, unlocking assets held by the Initia L1’s IBC escrow accounts. Around $3.27m of assets were moved to the attacker’s Initia L1 address with $2.16m of the stolen funds remaining on the paused L1 where they cannot be moved. The attacker sold stolen assets on the Initia DEX and then withdrew 13.4k TIA, 8k USDC.inj, and 597k Noble USDC reaching Initia’s outbound IBC rate limits. No INIT was withdrawn from Initia by the attacker. We intend to restore the backing of affected assets in full. We are finalizing the plan and will share the details once it is confirmed. As a precaution, we are rebuilding the affected infrastructure from scratch in an isolated environment, enforcing least-privilege access controls, and hardening security at every layer of the stack from cloud infrastructure to onchain IBC validation. Given the above, we expect this process to be longer than a routine network restart. We will share timelines as they become available. All announcements will be made through Initia’s official channels. Thank you for your patience.
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Lockdown Mode can't stop every attack, but it still offers valuable protection. We recommend turning it ON. We continue to report vulnerabilities to Apple, and our work should help make Lockdown Mode and Apple devices even more secure.
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Memory is what allows Claude to learn from experience. In a new Engineering Blog post, we share how “dreaming” helps Claude organize what it’s learned, correct its mistakes, and find what it needs more easily the next time. anthropic.com/research/compo…
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Since August, a team within METR has worked with internal Anthropic information to assess whether AI itself is accelerating AI development. We are now publishing a report summarizing the results of this risk assessment.
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Changing one letter bypassed an entire admin API in @huggingface chat. One request could trigger bulk internal exports of every user’s private chats, completely unauthenticated. Here’s how. 🧵
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Introducing GPT‑6 Cyber: a major advance in security research that pairs stronger capabilities with better model alignment. The model powered the Linux kernel research we announced yesterday, and security teams at companies like Mozilla, Palo Alto Networks, Calif, and Cisco—alongside our own at OpenAI—are already putting it to work. GPT-6 Cyber is available to select Daybreak Red customers and we are expanding access over time. openai.com/index/introducing…
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git.musl-libc.org/cgit/musl/… openwall.com/lists/musl/2024… When crypt() fails in musl libc: • If it returns NULL: lazy apps don't check for NULL, pass it straight to strcmp(), and segfault. So in 2012, musl changed it to return "*" to prevent crashes. Fast forward to 2024: security-conscious apps (like Linux-PAM) try to zero out the returned string in memory after checking the password. Since "*" is a string literal in read-only memory (.rodata), trying to overwrite it causes a segfault anyway. then 2026: sshhole pw=$(awk 'BEGIN { for (i=0; i<257; i++) printf "A" }') sshpass -p "$pw" ssh user@ip
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*sshole is out if you run sshd on alpine, openwrt or any musl box with password auth on: update now official writeup: sshhole.com
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Security release pre-alert: We will release new versions of Node.js 22, 24, and 26 release lines on or shortly, after 2026-11-11 in order to address security vulnerabilities. The highest severity issue fixed in this release is HIGH. nodejs.org/en/blog/vulnerabi…
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Meet Muse Guard ! a desktop pet for your Mac that literally jumps in when it spots something risky, like a phishing email in Chrome or your agent is about to rm-rf your desktop. It runs Meta’s Muse Glimmer on-device. Everything stays local :)
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The pipeline finds security-relevant code, scans for vulnerabilities, reproduces them in isolated environments, tests whether they can be exploited, and generates candidate patches. Human researchers review the results before reporting vulnerabilities and propose fixes to maintainers.
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🚨 BREAKING: A flaw in APT, the tool that installs software on Debian Linux, lets an attacker on the network tamper with a package after it passes verification and run code as root. The bug, CVE-2026-109518, sits in resumed HTTP downloads. APT can merge two different downloads when a redirect gives them the same address, and a man-in-the-middle can then alter the file after its check. Debian fixed it in apt 3.0.4, shipped to Debian 13 security updates on 4 November. Users should upgrade now. Per Debian's changelog, the fix is four words long. "Open target files exclusively."
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Lockdown Mode helps, until it doesn't.
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Playwright and browser security reminder. We saw a post suggesting that you delete Playwright because it bundles browsers with CVEs. That is a misconception. Do not delete Playwright🙃. Here is how it works and what you should do. No Playwright package bundles a browser. Agents on Playwright MCP or CLI run your stable Chrome, which gets Chrome's security updates, with the sandbox on. 🤖 If you use Playwright MCP or the Playwright CLI They use the stable Chrome / Edge on your machine, so it gets its normal updates. No config edit is needed. 🧪 If you use the test runner When you run npx playwright install, Playwright downloads Chrome for Testing, pinned to the build we tested that release against. The pin is on purpose. Your tests run on the same browser on every laptop and CI machine, and a browser update cannot suddenly break your suite. You choose when to move by upgrading Playwright. New releases usually pin a build ahead of stable Chrome, so you see breakage before your users do. We recommend this for full e2e test suites on your own trusted app. This build can miss Chrome security fixes until the next Playwright release, and by default it runs with the sandbox off. Do not use it on the hostile web. 📚 If you use the library API chromium.launch() has the same defaults: the pinned build with the sandbox off. If your code visits pages you don't control (scrapers, agent scripts), max out protection: chromium.launch({ channel: 'chrome', chromiumSandbox: true }) 🔒 Always keep Chrome / Edge updated. Some bugs can escape a sandbox. Happy testing!
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Amazon built a new AI agent runtime in Rust - youtu.be/os5eNeAVRpc
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A critical vulnerability went undetected through multiple security audits. Hacktron found it in 10 minutes. The vulnerability was in Dassault Systèmes' DELMIA Apriso, manufacturing software used by Boeing, Airbus, Lockheed Martin, and previously Apple. It became CVE-2025-5086. Three months after disclosure, CISA confirmed it was being actively exploited. Security assessments capture a point in time. Attackers don't work on your schedule. Full research: hacktron.ai/blog/dassault-de…
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