this post was submitted on 11 Apr 2024
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transcriptScreenshot of github showing part of the commit message of this commit with this text:

Remove the backdoor found in 5.6.0 and 5.6.1 (CVE-2024-3094).

While the backdoor was inactive (and thus harmless) without inserting
a small trigger code into the build system when the source package was
created, it's good to remove this anyway:

  - The executable payloads were embedded as binary blobs in
    the test files. This was a blatant violation of the
    Debian Free Software Guidelines.

  - On machines that see lots bots poking at the SSH port, the backdoor
    noticeably increased CPU load, resulting in degraded user experience
    and thus overwhelmingly negative user feedback.

  - The maintainer who added the backdoor has disappeared.

  - Backdoors are bad for security.

This reverts the following without making any other changes:

The sentence "This was a blatant violation of the Debian Free Software Guidelines" is highlighted.

Below the github screenshot is a frame of the 1998 film The Big Lebowski with the meme caption "What, are you a fucking park ranger now?" from the scene where that line was spoken.

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[–] [email protected] 14 points 5 months ago (1 children)

Backdoors are bad for security πŸ˜†πŸ˜†

[–] [email protected] 2 points 5 months ago (3 children)

oh dang removes backdoor from my house

[–] [email protected] 1 points 5 months ago

OnlyF~~ans~~rontDoor

[–] [email protected] 1 points 5 months ago

Didn't some pro-gun idiots suggest removing back doors from American schools

[–] [email protected] 1 points 5 months ago (1 children)

Hell yeah. Make the windows difficult to enter, and now you have a singular point of entry.

Then put a gun turret there.

[–] [email protected] 1 points 5 months ago

Your house isn't truly secure until you have a lava moat, and other ideas I came up with when I was eight.

[–] [email protected] 8 points 5 months ago

Best part to me is "The maintainer who added the backdoor has disappeared." implying it was removes because there's nobody left to maintain it

[–] [email protected] 6 points 5 months ago (1 children)

Backdoors are bad for security.

No shit....

[–] [email protected] 1 points 5 months ago

You've gotta wonder what else you'd write though

Especially given the urgency guy's probably not gonna sit there and ponder

[–] [email protected] 2 points 5 months ago

reminds me of the infamous NSA backdoor patch blog for Notepad++

[–] [email protected] 2 points 5 months ago (3 children)
[–] [email protected] 4 points 5 months ago

I can excuse attempting to compromise millions of computer systems worldwide for nefarious purposes but I draw the line at violating the contributor guidelines of an opensource project.

[–] [email protected] 4 points 5 months ago (1 children)

Its like saying bank robbery is against bank’s gun carrying policy.

Sure its true, but thats not really the problem being addressed. The massive, notorious security vulnerability is.

[–] [email protected] 1 points 5 months ago

Oh the big lebowsky part, i dont get it either

[–] [email protected] 0 points 5 months ago (1 children)

Yep, probably because it's not funny or clever. My guess is that you look for funny and/or clever in your jokes.

[–] [email protected] 0 points 5 months ago (1 children)

Someone explained it, turns out it's just not my kind of joke. I get it now tho

[–] [email protected] 0 points 5 months ago (1 children)

I'm still lost... I've been following the XZ thing since it broke, so I get the context, but I'm not sure how the meme at the bottom is connected?

[–] [email protected] 1 points 5 months ago (2 children)

On the photo you see a violation of rules listed as one of the reasons this commit is made. Because it's at the top the meme creator is presuming that's their main priority.

And they disagree with that, so they're calling them a "park ranger". I'm guessing they're alluding to an old but common media presentation of park rangers being childish about rules.

I get the joke with that it looks a bit odd to put that reason at the top of the list, but their response I find more unkind than funny

[–] [email protected] 1 points 5 months ago

As the image transcript in the post body explains, the image at the bottom is a scene from a well-known 1998 film (which, according to Wikipedia, was in 2014 selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant").

This meme will not make as much sense to people who have not seen the film. You can watch the referenced scene here. The context is that the main character, The Dude (played by Jeff Bridges) has recently had his private residence invaded by a group of nihilists with a pet marmot (actually portrayed by a ferret) and they have threatened to "cut off his Johnson". In an attempt to express sympathy, The Dude's friend Walter (played by John Goodman) points out that, in addition to the home invasion and threats, the nihilists' exotic pet is also illegal. The Dude's retort "what, are you a fucking park ranger now" is expressing irritation with that observation, because it is insignificant compared with the threat of the removal of his penis.

This meme attempts to draw a parallel between this humorous scene and XZ developer Lasse Collin's observation that the XZ backdoor was also a violation of Debian's software licensing policies.

Thank you for reading my artist's statement.

[–] [email protected] 1 points 5 months ago (1 children)

It's a scene from The Big Lebowski, right after The Dude got tortured with a marmot by German nihilists. Walter focuses on the legality of keeping a marmot as a pet, which is obviously not the main issue.

[–] [email protected] -1 points 5 months ago (1 children)

Yea, I've seen that kind of humour in my grandpa's movies sometimes too. Not my thing

[–] [email protected] 2 points 5 months ago

The Big Lebowski is the pinnacle of humour! Now get off my lawn!

[–] [email protected] 2 points 5 months ago (3 children)

Seriously. If you are going to do it, write in assembly or something else no one understands.

[–] [email protected] 3 points 5 months ago (1 children)

Tbh jia tan really wasn't lucky some mf at Microsoft noticed a 500ms delay in ssh. The backdoor was so incredibely clever and Well hidden and ingenious i almost feel bad for him lmao

[–] [email protected] 3 points 5 months ago (2 children)

A really good point I heard is: this was likely a state actor attack, so how many others just like this are out there, undiscovered?

[–] [email protected] 1 points 5 months ago

It’s scary to think about… a lot of people are now thinking about how we can best isolate our build test process so it works as a test suite but doesn’t have any way to interact with the output or environment.

It’s just blows my mind to think of the levels of obfuscation this process used and how easy it would be to miss it.

[–] [email protected] 1 points 5 months ago (5 children)

Unpopular opinion: what if it was not a state actor and just some bored person somewhere that thought it would be cool to own a bot net?

What if this is just one of many backdoors and it’s just the only one we found?

[–] [email protected] 3 points 5 months ago* (last edited 5 months ago) (2 children)

I heard that person actively contributed for something like 2 years, providing actually useful contributions, to gain the level of trust needed to plant that backdoor. Feels a bit too much to chalk it up to boredom.

As for the second part, that's an interesting question. Are there lots of backdoors and we just happened to notice this one, or are backdoors very rare exactly because we'd have found them out soon like in this case?

[–] [email protected] 1 points 5 months ago* (last edited 5 months ago) (1 children)

You'd be surprised what I manage with motivation and boredom.
You'd be surprised what a highly skilled ~~scalled~~ person can manage to achieve.

Boredom, Skills and Motivation are dangerous things to have if improperly handled.

[–] [email protected] 1 points 5 months ago

highly scalled person

You might be on to something, it might have been the lizzard people!

[–] [email protected] 0 points 5 months ago* (last edited 5 months ago)

Another speculation from the suse team was a private company with intent to sell the exploit to state ~~across~~ actors

I think there's lots of known backdoors that are not publicly disclosed and privately sold.

But given the history of cves in inclined to believe most come from well intentioned developers. When you read the blogs from the Google security team for example, it's interesting to see how you need to chain a couple exploits at least, to get a proper attack going. Not in this case, it would make it very straightforward to accomplish very intrusive actions.

[–] [email protected] 1 points 5 months ago

Realistically I think it's probably easier to acquire a botnet of less secure systems. This was a targeted attack.

[–] [email protected] 1 points 5 months ago (1 children)

Nobody is both that bored and that motivated. Unless paid.

[–] [email protected] 2 points 5 months ago* (last edited 5 months ago)

You forget that a lot of brilliant open source projects are one man shows from geniuses somewhere around the world. They are usually not paid.

In the other hand, if you get your hands on a powerful botnet, you can rent out its services (like ddos for example) for quite a bit of money.

[–] [email protected] 1 points 5 months ago

The design is Moriarty lvls of complex. State actor might be too specific, but everything but a group of people would be highly unlikely.

[–] [email protected] 1 points 5 months ago

Yeah, well that's just, like, your opinion, man. (You mentioned the word opinion in a post referencing The Big Lebowski. I had to. Thank you for coming to my shit post.)

[–] [email protected] 1 points 5 months ago

Aggressively writes a backdoor in COBOL

[–] [email protected] 0 points 5 months ago (1 children)

Assembly wouldn't run on multiple architectures

[–] [email protected] 1 points 5 months ago

Neither does the blob it downloaded. Would you think twice about AVX10 support if it was commented as AVX10 support in a compression library? Some might, but would they be the ones reviewing the code? A lot of programs that can take advantage of "handwritten" optimizations, like video decoders/encoders and compression, have assembly pathways so it will take advantage of the hardware when it is available but run when it isn't. If the reviewers are not familiar with assembly enough something could be snuck in.

systemD is using dlopens for libraries now and I am not convinced malware couldn't modify the core executable memory and stay resident even after the dl is unloaded. Difficult, yes, but not impossible.