iiinova — where your digital self keeps evolving

Michal Špaček @spazef0rze.bsky.social · 08/10/2026

If you own a domain and serve a JS for your customers and you close the app, you still have to pay for the domain forever. Otherwise someone will buy it and start serving malicious JS. The newest case: ecomtrack-io. Existed for years, reregistered in September, now serves malware :-(

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Michal Špaček @spazef0rze.bsky.social · 30/09/2026

Microsoft has added a native Linux containers support to Windows via CLI and API and is planning to further develop it. Imagine traveling back in time 20 years and posting this to a random online discussion forum 😅 blogs.windows.com/windowsdevel...

blogs.windows.com

WSL containers is now generally available

WSL is central to our commitment to making Windows the best place to build, run and manage Linux workloads. As AI, cloud-native development, containers, and open-source ecosystems continue to converge...

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Michal Špaček @spazef0rze.bsky.social · 26/09/2026

Sometimes it's the small things. Thanks Chrome Dev Tools, "Edit and resend as fetch" saves me a lot of "Copy as fetch, Ctrl+V, damn this is not the console window"-moments.

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Michal Špaček @spazef0rze.bsky.social · 19/09/2026

If you google Bletchley Park you get this cool on-topic Easter egg

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Michal Špaček @spazef0rze.bsky.social · 16/09/2026

Recently I had a lot of undelivered emails, the sending server simply couldn't connect. Another sender that couldn't connect was a major local mail service provider. Once switched to smtp.google.com, some of the messages were redelivered. If you're using mx[1-4].smtp.goog then... maybe don't, YMMV.

smtp.google.com

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Michal Špaček @spazef0rze.bsky.social · 16/09/2026

For some time, I've been using mx[1-4].smtp.goog for my DNS MX records - Google's unofficial DNSSEC signed MX. It was even official for a short time about a year ago: web.archive.org/web/20250904... but that link now redirects to a page that just says to use smtp.google.com. But recently...

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Michal Špaček @spazef0rze.bsky.social · 15/08/2026

I just learned there's a .CYOU ("See you") top-level domain. I fully expected it to be a typo of a .CZ domain (because Czech and English keyboards have swapped Y and Z, and even I personally sometimes type .CY instead of .CZ), but no, not a typo. And there's also the .ICU ("I see you") domain 🙄

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Michal Špaček @spazef0rze.bsky.social · 26/05/2026

After many JS-related supply chain attacks, there's a new PHP one! "The attacker replaced many or all release tags in four laravel-lang/ repositories with malicious lookalikes that point to their own commits which contained malware." snyk.io/blog/laravel...

snyk.io

Laravel Lang Supply Chain Advisory | Snyk

Laravel Lang Packagist releases were republished with malicious code. Learn how the supply chain attack worked, what was stolen, and how to respond.

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Michal Špaček @spazef0rze.bsky.social · 24/05/2026

Whenever I see an email like this (in my spambox), with a Google Form asking for your email and a repo URL, all I can see is yet another supply chain attack in the making. I wouldn't want to run a legit competition nowadays 😅 (Disclaimer: I have no idea what KaiCode is)

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Michal Špaček @spazef0rze.bsky.social · 30/04/2026

Detailed report from DigiCert (thanks!) about "a limited number of code signing certificates, few of which were then used to sign malware". At the beginning a ZIP file with a .scr executable, and some time later 60 revoked Code Signing certificates. bugzilla.mozilla.org/show_bug.cgi...

bugzilla.mozilla.org

2033170 - DigiCert: Misissued code signing certificates

ASSIGNED (dcbugzillaresponse) in CA Program - CA Certificate Compliance. Last updated 2026-04-28.

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Michal Špaček @spazef0rze.bsky.social · 04/04/2026

The Axios supply chain attack post mortem notes show how it was done: via a fake cloned company on a fake Teams call. The two comments with details: github.com/axios/axios/... and github.com/axios/axios/...

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Michal Špaček @spazef0rze.bsky.social · 28/03/2026

Here's your (ir)regular reminder that HTTPS certificates without the CN (Common Name) field are completely valid. For example the 6-day certificates from Let's Encrypt do not have a CN as per the "shortlived" profile letsencrypt.org/docs/profiles/

letsencrypt.org

Profiles

A profile is a collection of characteristics that describe both the validation process required to get a certificate, and the final contents of that certificate. For the vast majority of Let’s Encrypt...

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Michal Špaček @spazef0rze.bsky.social · 25/03/2026

There's a chance they need to store my data to not use them anymore if a new "enrichment source" appears. They also say they're not controllers as per GDPR, only processors, but entering my data could made them one. I could be wrong though. This will be 🤔 and I hope I'll learn a thing or two.

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Michal Špaček @spazef0rze.bsky.social · 25/03/2026

I always find entering personal details into a website to tell them to stop processing my personal data a bit absurd. This biz data enrichment company is processing my personal phone number. They told me to fill out this form, so I did. Now I'm asking how they process my data I have entered 😅

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Michal Špaček @spazef0rze.bsky.social · 16/03/2026

My favorite XSS trick when you can add only attributes (when < and > are removed from the input) is to add onfocus=alert(1) and autofocus: <input value="" onfocus="..." autofocus=""> To not create a loop, I add this.blur(), otherwise alert() steals the focus, and then the field gains it once again.

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Michal Špaček @spazef0rze.bsky.social · 13/03/2026

Naming is hard, so that's why my PHPStan extension called "Disallowed **Calls**" now supports disallowing **properties** 😅 Also a Friday the 13th release 👻 (at least in my timezone) github.com/spaze/phpsta...

github.com

Release Can disallow properties · spaze/phpstan-disallowed-calls

Naming is hard, so that's why this Disallowed Calls extension now supports disallowing instance and static properties, and enum properties with disallowProperties (#378) Other (mostly) internal cha...

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Michal Špaček @spazef0rze.bsky.social · 27/01/2026

When issuing a HTTPS certificate, the CA needs to make sure you own the domain, and one of the many methods is via email where they'll email you a link. This method will be discouraged in March 2026, disabled in March 2028. See security.googleblog.com/2025/12/http... + cabforum.org/2025/11/20/b...

security.googleblog.com

HTTPS certificate industry phasing out less secure domain validation methods

Posted by Chrome Root Program Team Secure connections are the backbone of the modern web, but a certificate is only as trustworthy as the...

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Michal Špaček @spazef0rze.bsky.social · 29/12/2025

Instead of `cat`, I use `bat`, "a cat(1) clone with wings." github.com/sharkdp/bat It supports syntax, line nrs, git etc. I have it aliased to `cat`. If you'd like to concat multiple files into one (`cat 1 2 3 > foo`), you should run the original like `\cat`, seems faster, in my case up to 10x.

github.com

GitHub - sharkdp/bat: A cat(1) clone with wings.

A cat(1) clone with wings. Contribute to sharkdp/bat development by creating an account on GitHub.

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Michal Špaček @spazef0rze.bsky.social · 18/12/2025

Best news I've discovered today is that ripgrep is also available for Windows and you can install it with winget (winget install ripgrep). ripgrep is like the grep utility in Linux, but a bit faster, it also accepts grep's params github.com/burntsushi/r...

github.com

GitHub - BurntSushi/ripgrep: ripgrep recursively searches directories for a regex pattern while respecting your gitignore

ripgrep recursively searches directories for a regex pattern while respecting your gitignore - BurntSushi/ripgrep

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Reposted by Michal Špaček

Per Thorsheim @thorsheim.bsky.social · 09/12/2025

Michal Špaček @spazef0rze.bsky.social presenting his talk "Password Reuse Is a Dumpster Fire – We Brought a Hose" at #PasswordsCon in Prague, December 2, 2025. youtu.be/AuCNgoDf-5c

youtu.be

Michal Špaček: Password Reuse Is a Dumpster Fire – We Brought a Hose

YouTube video by Per Thorsheim

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Michal Špaček @spazef0rze.bsky.social · 28/11/2025

Looking at my access logs, the easiest way to block web scanners & bots is to block requests with a User-Agent header that says "old browser" where old is -10 major versions and older😁 For example Chrome is v142 and bots use Chrome/120, 116 etc. It's mostly a fun idea but it seems like I need a PoC😅

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Michal Špaček @spazef0rze.bsky.social · 29/10/2025

TIL that OCI stands for "Oracle Cloud Infrastructure" and also "Open Container Initiative". I've first learned about the former ("Oracle Cloud Infrastructure") and just spent 5 minutes trying to understand a bug where they used OCI in the latter meaning ("resolves remote OCI artifacts")

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Michal Špaček @spazef0rze.bsky.social · 16/10/2025

Díky za (virtuální) návštěvu přednášky, těší mě, že se líbila :-)

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Reposted by Michal Špaček

Eiji Kitamura / えーじ @agektmr.com · 10/10/2025

Chrome for Android can now help users adopt passkeys more seamlessly. If a user signs in with a saved password , your website can request that an associated password manager (in many cases on Chrome is Google Password Manager) creates a passkey automatically. developer.chrome.com/blog/automat...

developer.chrome.com

Automatic passkey creation in Chrome for Android | Blog | Chrome for Developers

Chrome for Android can now automatically create passkeys after password sign-in, helping users transition to passkeys with less friction.

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Michal Špaček @spazef0rze.bsky.social · 24/09/2025

My random number generator just did a Dilbert

Upper part of the image is a Dilbert comic titled "Tour of Accounting" where in the first frame there's Dilbert presumably in hell, because there's a creature resembling a cute devil next to him. The creature is saying "Over here we have our random number generator." In the next frame there's another creature saying "Nine nine nine nine nine nine". In the last frame Dilbert asks "Are you sure that's random?" while the creature from the first frame responds "That's the problem with randomness, you can never be sure."

Below the strip is a screenshot of a code using a random number generator:
> random_int(0, 29)
= 9

> random_int(0, 29)
= 9

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Michal Špaček @spazef0rze.bsky.social · 18/09/2025

Did you know Facebook has a Certificate Transparency monitoring tool? Never mind then, they're shutting it down anyway :-) developers.facebook.com/tools/ct

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Michal Špaček @spazef0rze.bsky.social · 14/09/2025

You can configure it any way you want or need, but the extension comes with a bundled configuration files you can use out of the box. One of them disallows dangerous functions like var_dump() or put_env(), while another one blocks insecure functions like hash() with MD5 github.com/spaze/phpsta...

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Michal Špaček @spazef0rze.bsky.social · 14/09/2025

Just noticed that my PHPStan extension to detect disallowed calls, methods, attributes, constants etc. has been installed more than 15M times, wow! Not bad for a weekend project (a long weekend since 2018). PHPStan itself has 300M installs, so 5% of all PHPStans installs use the extension, nice! :-)

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Michal Špaček @spazef0rze.bsky.social · 24/08/2025

Just got one certificate using the tlsserver profile and of course as expected, the browsers are doing just fine, they just omit the field (Chrome), or say unknown (Firefox, could be confusing though).

Chrome Certificate Viewer displaying a certificate without the CN field: In "Issued To" it says "Common Name (CN) <Not Part Of Certificate>"

Chrome developer tools Security tab, the Subject field is empty when the certificate has no CN

Firefox certificate viewer says "(unknown)" in the tab title when viewing a certificate without a CN field.

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Michal Špaček @spazef0rze.bsky.social · 24/08/2025

There's another @letsencrypt.bsky.social certificate type ("profile") that doesn't come with a CN (Common Name) field anymore: the tlsserver profile. It's a 90 day cert, its properties "reflect the latest recommendations from the CA/Browser Forum Baseline Requirements, as well as general trends."

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Michal Špaček @spazef0rze.bsky.social · 23/08/2025

Such certificates are not very common today, but they will be more common in the future. For example Let's Encrypt's short-lived 6 day certificates do not have the CN field letsencrypt.org/docs/profiles/ You can find a cert without the CN field for testing here letsencrypt.org/2025/02/20/f...

letsencrypt.org

Profiles

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Michal Špaček @spazef0rze.bsky.social · 23/08/2025

HTTPS certificates can exist without the CN (Common Name) field. It's not used for validation, instead browsers use the SAN (Subject Alternative Names) field. But if your tool uses CN for anything, e.g. to show a "name" for management purposes, check whether the tool works with CN-less certificates

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Michal Špaček @spazef0rze.bsky.social · 08/08/2025

420: Czech your DNS cache (420 is the CZ phone country code and this is a lame joke of mine 😅)

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Michal Špaček @spazef0rze.bsky.social · 08/08/2025

Here's a draft written by ChatGPT 😁 It has defined the new code 432 and even a new media type application/dns-refresh+json that would provide more details on why do you feel the client should refresh their cache gist.github.com/spaze/c1e100...

gist.github.com

"Refresh DNS" RFC draft as written by ChatGPT because bots frustrate me

"Refresh DNS" RFC draft as written by ChatGPT because bots frustrate me - "Refresh DNS" RFC draft prompt.txt

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Michal Špaček @spazef0rze.bsky.social · 08/08/2025

There should be an HTTP response code in the 4xx range that would instruct the client to refresh their stale DNS records. Even after 48 hours some bots (looking at you Palo Alto Networks) are using the old IP for a hostname, while the DNS records have TTL of 5 minutes or so.

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Michal Špaček @spazef0rze.bsky.social · 01/08/2025

Here's one information for you: should be more specific when phishing IT folks

Someone in my DMs:
Hi Do you have any debit card information you can share with me? I’m struggling atm. Need help

Me:
Yeah, it’s a matte plastic Visa debit card, issued by a local bank. Made in 2024. The chip’s shiny. Hope that helps!

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Michal Špaček @spazef0rze.bsky.social · 01/08/2025

GiveWP (the donations WordPress plugin) managed to leak donors' emails into the donation form. And then they managed to mess up the communication :-( Nice resume of the problem at the Pi-hole blog as they were one of the affected sites pi-hole.net/blog/2025/07... Go and learn how to communicate.

pi-hole.net

Compromised Donor Emails: A post-mortem – Pi-hole

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Michal Špaček @spazef0rze.bsky.social · 01/08/2025

Absolutely! I hope that translates to free data transfers! Or maybe not 😅

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Michal Špaček @spazef0rze.bsky.social · 29/07/2025

Setting up a new server and I'm so happy I can do it remotely because it must be absolutely cold in the data center

A Linux login screen after signing in, shows "Temperature: -273.1 C"

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Michal Špaček @spazef0rze.bsky.social · 28/07/2025

My last name (Špaček) means starling in Czech. This guy used my veeery distant relative to store an image, nice 😁 Looking forward to an update to RFC 1149 where you don't need a small scroll of paper but instead use the carrier itself to store the data.

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Michal Špaček @spazef0rze.bsky.social · 26/07/2025

Just remembered Wolf3D had no multiplayer, but we've still managed to play it co-op style with a friend of mine: the two of us were sitting at one computer, he was using the arrow keys to navigate, I was using the spacebar to shoot. I also remember the headache after many hours of nonstop action 😅

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Michal Špaček @spazef0rze.bsky.social · 26/07/2025

I was today years old when I found out that the name of the company who's created Wolfenstein 3D and Doom, id Software, is pronounced "id software", "id" as in "kid", not "eye dee software" That's some 30 years after playing the games... en.wikipedia.org/wiki/Id_Soft...

en.wikipedia.org

id Software - Wikipedia

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Michal Špaček @spazef0rze.bsky.social · 23/07/2025

Git reflog is a log of what happened in your repo. Commited this, amended that, reset to this etc. It has references (the "ref" in reflog) which you can use to get back to a previous state of your repository. For me, a highly useful feature, probably not that well known. It has saved me many times.

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Michal Špaček @spazef0rze.bsky.social · 23/07/2025

It's been 0 days since git reflog saved my ass (and files) again. Instead of rebase this branch, I did reset this branch, losing my commits. `git reflog`, find out what happened (reset at {46} and {48} in the pic), then `git branch name id` (id ends with 67 at {50}, commits are back.

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Michal Špaček @spazef0rze.bsky.social · 09/07/2025

What do you do when you can't sleep? I fine-tune my HTTP reasons 💤

A screenshot from a terminal with a curl output that shows an HTTP response with "HTTP/1.1 404 This is a not found page source trust me bro" HTTP status code and reason, followed by some other standard HTTP response headers like Date, Content-Type, Transfer-Encoding and Connection, all with rather expected values.

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Michal Špaček @spazef0rze.bsky.social · 07/07/2025

I've asked ChatGPT to generate me a temp profile picture and when I've praised the creation it didn't know what to say, so it gave me back some JSON with a prompt that has resembled my instructions. ChatGPT then claimed, multiple times that I asked for the JSON 😁 I haven't talked about JSON before.

Screenshot of ChatGPT sending me my temp pic, my reaction "fuck me thats cool" with ChatGPT responding back with some JSON.

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Michal Špaček @spazef0rze.bsky.social · 26/06/2025

Stored XSS via an archive file stored in a RAR archive, nice 😁 Fixed in WinRAR 7.12 released yesterday.

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Michal Špaček @spazef0rze.bsky.social · 25/06/2025

Oops, being a web developer can be dangerous! 🤣

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Michal Špaček @spazef0rze.bsky.social · 25/06/2025

I have a battery powered outdoor camera, it can last several weeks on a single charge in that environment. But suddenly, the battery went from 20% to 0% overnight. I was curious what happened so I checked the last pic it has recorded. Yeah, thanks little fella 😂

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