We are research group with focus to expose bugs in design and implementation of blockchain projects. We only honour responsible disclosure with projects that honour responsible development.
16 Feb 2020 10 minute read 0 comments art_of_bug
Nice to see you again. Today we are back to Syscoin. Previously we have published two submissions to the bounty related to the implementation of Sysethereum bridge. Today we present a vulnerability that we found before working on the mentioned bounty...
19 Jan 2020 4 minute read 4 comments art_of_bug
Welcome again. This is probably the last time we write about Neblio. We could create new and new reports because its code is incredibly buggy, but it makes no sense given the attitude of the Neblio development team. So, just to prove the point, here...
26 Dec 2019 8 minute read 0 comments art_of_bug
Welcome to the next episode. In September we have published NavCoin – Bypassing Header Spam Protection, which was a denial of service attack against the header spam filter in NavCoin. As far as we know, this issue has not been fixed in NavCoin yet. A...
27 Nov 2019 7 minute read 3 comments art_of_bug
Welcome back. Today we are back to Syscoin. Previously we have published two submissions to the bounty related to the implementation of the Sysethereum bridge. Today we present another vulnerability that we found later in the Sysethereum bridge impl...
31 Oct 2019 5 minute read 1 comment art_of_bug
Welcome back. Last time we explained how Neblio's attempt to fix the DoS vulnerability we reported many months ago did not actually work and that it only addressed our specific exploit implementation. We explained how to perform this attack against t...
13 Oct 2019 4 minute read 0 comments art_of_bug
Welcome. Remember our very first post? Recall that we didn't like the way Neblio team (not)communicated. We published a vulnerability in their code and waited for the reaction. At first it seemed like they acknowledged the problem with poor communic...
29 Sep 2019 7 minute read 0 comments art_of_bug
Welcome back. Today we open Qtum. We started to participate in Qtum's bug bounty program many months ago and we already submitted several findings there, all of which have been accepted. Today we present one of the vulnerabilities that have been fixe...
14 Sep 2019 6 minute read 5 comments art_of_bug
Welcome back. Today we will talk about NavCoin. We start with a little rant as we sometimes do when we feel things could have gone better. Then we disclose an unpatched vulnerability in NavCoin Core which was caused by copying and pasting the code fr...
28 Aug 2019 4 minute read 0 comments art_of_bug
Nice to see you again. Last time we have described our first submission to the hack the Syscoin's Ethereum bridge bounty (do follow this link also to find information about Syscoin Ethereum bridge, some understanding of it is useful to be able to gra...
14 Aug 2019 16 minute read 2 comments art_of_bug
Welcome back. Hacking production chains a.k.a. mainnets is the most fun, but when incentives allow, exploring testnets can be fun too. The following is our first submission to the hack the Syscoin's Ethereum bridge bounty (do follow this link also to...
