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RedSun: System user access on Win 11/10 and Server with the April 2026 Update

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21–30 of 67 posts

Re: RedSun: System user access on Win 11/10 and Server with the April 2026 Update

#21
post #4

> normally I would just drop the PoC code and let people figure it out Looks like that's exactly what they did though? Or maybe they just meant that they don't usually explain how it works?

Tney gave it a sexy name and set up a website about it (a github repo, at any rate), instead of just talking about it in a mailing list and getting a CVE like a proper bearded security researcher.

It’s getting warm above the equator, they may have shaved for the season.

Re: RedSun: System user access on Win 11/10 and Server with the April 2026 Update

#22
post #13

A local privilege escalation to root via an exploitable service? Doesn't Linux have one of these CVEs...each week?

Only if you’re running daemons as root. Which would be an idiotic move to begin with because that’s not how distros package their services. So you’d have to intentionally make this mistake.

Intentionally?

Ignorance is bliss! Simply use docker in its (old) default setup, instead of podman, apptainer, docker-rootless ... and that world is yours.

Added bonuses are the incredible stupid integration with ufw on Ubuntu, images with laughable uid mapping, ...

How that shit got traction baffles me.

Re: RedSun: System user access on Win 11/10 and Server with the April 2026 Update

#23
post #20

I remember the times when Microsoft had a lot of problems 20 years ago because of Sasser and other viruses that were taking over Windows. They did not have any contenders. Yet they have stopped any software development for 9 months just to re-work their entire codebase to prevent things like direct memory execution and stuff like that. The result of that was Windows XP Service Pack 2. After that thing windows XP beca…

> Windows XP Service Pack 2. After that thing windows XP became a legend.

God that was an era. XP SP2 was a great OS, IE was the best browser, MSN was the most popular messenger, Skype was acquired, HTC's Windows CE devices were shipping real web browsers that worked over 3G.

By the end of the Ballmer era, Microsoft has lost the OS, the browser, the messenger, the meeting service and mobile.

Re: RedSun: System user access on Win 11/10 and Server with the April 2026 Update

#27
post #20

I remember the times when Microsoft had a lot of problems 20 years ago because of Sasser and other viruses that were taking over Windows. They did not have any contenders. Yet they have stopped any software development for 9 months just to re-work their entire codebase to prevent things like direct memory execution and stuff like that. The result of that was Windows XP Service Pack 2. After that thing windows XP beca…

I don't think SP2 made much of a difference in the popularity of XP. It was already dominant, and it's mostly remembered as "legendary" because it had become the target platform for every hardware and software vendor on the planet. Windows 98 was too flaky to engender any serious friction to upgrades, and Windows 2000 was not consumer-friendly enough; XP effectively unified the consumer and professional desktop markets, and became the gold standard.

SP2, if anything, slowed down adoption, since it threw a bunch of spanners in the way of third-party code. It was probably necessary, just to stem the flow of bad press, but no mean a key in XP's overall success.

Re: RedSun: System user access on Win 11/10 and Server with the April 2026 Update

#28
post #24

Tried to download and Defender blocks it.

That's how the exploit works.

I can't seem to find any system files replaced, and the .exe was never executed. I'm running this in a test VM, but from what I can see, Defender signatures have been updated to block this prior to execution.

The exploit, from my reading, needs to be executed in order to do it's thing, but Defender isn't allowing it to be written to the filesystem on download.

Re: RedSun: System user access on Win 11/10 and Server with the April 2026 Update

#29
post #23
post #20

I remember the times when Microsoft had a lot of problems 20 years ago because of Sasser and other viruses that were taking over Windows. They did not have any contenders. Yet they have stopped any software development for 9 months just to re-work their entire codebase to prevent things like direct memory execution and stuff like that. The result of that was Windows XP Service Pack 2. After that thing windows XP beca…

> Windows XP Service Pack 2. After that thing windows XP became a legend. God that was an era. XP SP2 was a great OS, IE was the best browser, MSN was the most popular messenger, Skype was acquired, HTC's Windows CE devices were shipping real web browsers that worked over 3G. By the end of the Ballmer era, Microsoft has lost the OS, the browser, the messenger, the meeting service and mobile.

I agree with you on everything except the browser. I'm pretty sure I was using Firefox (or maybe Opera?) on Windows before the release of Vista. I know I was still using IE for some ActiveX web apps for a while. This was the era that I switched over to Linux full-time, but both Windows 2000 and XP were great OSes at this time. Linux was painful to adopt, but I really loved the promise of "full-control" over my computer.

My peeve today is how bad modern chat programs feel compared to the old instant messengers. The modern programs all feel slow and clunky in comparison. I felt that all of the messengers I used (MSN, AIM, ICQ) were more responsive than their modern day equivalents.

Re: RedSun: System user access on Win 11/10 and Server with the April 2026 Update

#30
post #29
post #23

Earlier quoted context omitted.

> Windows XP Service Pack 2. After that thing windows XP became a legend. God that was an era. XP SP2 was a great OS, IE was the best browser, MSN was the most popular messenger, Skype was acquired, HTC's Windows CE devices were shipping real web browsers that worked over 3G. By the end of the Ballmer era, Microsoft has lost the OS, the browser, the messenger, the meeting service and mobile.

I agree with you on everything except the browser. I'm pretty sure I was using Firefox (or maybe Opera?) on Windows before the release of Vista. I know I was still using IE for some ActiveX web apps for a while. This was the era that I switched over to Linux full-time, but both Windows 2000 and XP were great OSes at this time. Linux was painful to adopt, but I really loved the promise of "full-control" over my comput…

Boy oh boy, have we forgotten the Maxthon? https://en.wikipedia.org/wiki/Maxthon

I remember the times when IE passed ACID test? Do we remember the ACID? http://acid2.acidtests.org/#top

Ah, what the times were those. Firefox was just gaining traction.

And I agree. Slack is sitting there, consuming over gig of memory on my computer, and Miranda NG was able to do the same functionality with cool skins and just 30 megs of ram.

Skins... Skins... We've lost even those...

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