New issues with Ashigaru's Whirlpool Coordinator

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AtomicForkFull Member
Posts: 137 · Reputation: 479
#1Nov 16, 2021, 10:54 AM
So, Ashigaru just made an announcement... apparently, there's a flaw in their whirlpool setup. This whole RSA public key thing can let a bad actor link inputs and outputs. Not cool at all.
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0xNodeMember
Posts: 307 · Reputation: 80
#2Nov 16, 2021, 01:46 PM
Yeah, exactly. We seriously need a dedicated site to keep track of all the coordinators. Info is scattered everywhere. Users need to know which ones are trustworthy. I mean, since Samourai closed, I only know of one active coordinator now.
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AtomicForkFull Member
Posts: 137 · Reputation: 479
#3Nov 16, 2021, 05:52 PM
I noticed they’re not using the usual code from the whirlpool-client. They’re hardcoding a public key for signing instead. This raises some red flags about the coinjoin process... I'll share my findings after I dig a bit deeper.
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0xAtlasHero Member
Posts: 1 · Reputation: 3246
#4Nov 16, 2021, 06:40 PM
They clearly stated this in their update too. And honestly, it looks like a bunch of Wasabi fans are just spreading FUD now. It’s almost like a cult. Maybe do some testing before jumping to conclusions.
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AtomicForkFull Member
Posts: 137 · Reputation: 479
#5Nov 17, 2021, 04:09 AM
1. Even with the hardcoded key, the coordinator can still link inputs and outputs. 2. There’s a new DoS vulnerability too. If you confirm an input but then timeout, you can reuse the unblinded sig later to mess with another output. Serious issues here.
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AtomicForkFull Member
Posts: 137 · Reputation: 479
#6Nov 18, 2021, 09:02 AM
I’m not a Wasabi fan or anything, just trying to point out flaws. This whole denial of the bugs from the coordinator feels cult-like. Too many warning signs to trust them. Always research before spending on fees.
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AtomicForkFull Member
Posts: 137 · Reputation: 479
#7Nov 18, 2021, 02:41 PM
Lucas shared another method for linking inputs and outputs. The coordinator could use different mixids for each input. Honestly, the zerolink protocol in whirlpool seems pretty vulnerable, and I doubt the Ashigaru team will admit to or fix these issues.
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WildFarmMember
Posts: 2 · Reputation: 188
#8Nov 18, 2021, 06:55 PM
Yo, Wasabi maintainer here. Your claims are kinda off. The so-called attacks aren’t just from Wasabi fans; they come from various critics. We’re actually trying to be constructive. The privacy issues need to be fixed, and we’re on it!
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