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David Buchanan's Blog

CTF writeups, programming, and miscellaneous stuff.

da.vidbuchanan.co.uk ↗RSS feed ↗33 posts

Latest posts

Slop Cleanup Duty

AI can only solve Boring Problems

Shell Permission Errors for Busy Coding Agents

Adversarial ATProto PDS Migration

When Circumvention Is More Popular Than Compliance

Stop Saying "Responsible Disclosure"

UofTCTF 2025: An AES Timing Side-Channel

2024 Retrospective

There Is No Universal De-Select-All Idiom

Can You Get Root With Only a Cigarette Lighter?

Jailbreaking RabbitOS: Uncovering Secret Logs, and GPL Violations

SIMD in Pure Python

Text Editors Should Be Worse

2024 Will Be the Year of the Blog

Another Way Not to Sign JSON

Blogging With Math

Colliding Secure Hashes

Hijacking Bluesky Identities with a Malleable Deputy

s32 Unix Clock

Exploiting aCropalypse: Recovering Truncated PNGs

The Quest for Netflix on Asahi Linux

Hello, PNG!

BGGP3: Chipping Out

V8 Heap pwn and /dev/memes - WebOS Root LPE

35c3ctf: Collection - an Unintended Solution!

WPICTF 2018: Forker[1-4] Writeup - Blind-ish ROP

WPICTF 2018: Jay-Peg Writeup - LSB-Stego

HITB-XCTF GSEC 2018 Quals: babypwn - Blind Format String Exploitation

0CTF 2018 Quals: Baby Stack - ret2dlresolve

Crashing QEMU VGA Drivers - The Story of my First CVE

CTF Writeup: Hackvent 2017 Day 23 - "Only Perl"

CTF Writeup: Hackvent 2017 Day 21 - "Tamagotchi"

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