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Így bukott meg a Polkadot-token támadás

Így bukott meg a Polkadot-token támadás









Egy rendkívül szokatlan és tanulságos támadás történt a kriptovilágban: egy hacker közel egymilliárd dollár értékben hozott létre hamis Polkadot tokeneket az Ethereum hálózatán. A történet azonban nem klasszikus „óriási lopásként” végződött, ugyanis a támadó végül mindössze körülbelül 250 000 dollárt tudott valós értékké alakítani.

Egy súlyos hiba a háttérben

A támadás egy úgynevezett hídmegoldást érintett, amely különböző blokkláncok közötti átjárást biztosít. Ebben az esetben a probléma a Polkadot és az Ethereum közötti kapcsolatnál jelentkezett, egy olyan rendszerben, amely lehetővé teszi, hogy a felhasználók „becsomagolt” tokenek formájában használják az egyik lánc eszközeit a másikon.

A sebezhetőség abból fakadt, hogy a rendszer nem ellenőrizte megfelelően, valóban létezik-e a fedezet a kibocsátott tokenek mögött. Ezt kihasználva a támadó gyakorlatilag a semmiből tudott hatalmas mennyiségű hamis tokent létrehozni.

Fontos azonban kiemelni, hogy maga a Polkadot hálózat nem sérült. A probléma kizárólag az Ethereum oldalán, egy külső okosszerződésben jelentkezett, amely Polkadot-eszközöket próbált reprezentálni.

Miért nem lett ebből milliárdos lopás

Első ránézésre az egymilliárd dolláros „gyártás” drámai számnak tűnik, de a valóságban a kriptopiac működése komoly korlátokat állít az ilyen támadások elé.

Ahhoz, hogy egy token valódi értéket képviseljen, szükség van likviditásra, vagyis olyan piacra, ahol mások hajlandóak azt megvásárolni. A hamis tokenek esetében ez a feltétel nem teljesült. A piac gyorsan felismerte a problémát, a likviditás gyakorlatilag eltűnt, így a támadó nem tudta nagyobb mértékben pénzzé tenni a megszerzett eszközöket.

A CertiK blokklánc-biztonsági cég gyorsan észlelte a támadást, ami szintén hozzájárult a károk minimalizálásához. Az ilyen gyors reakciók egyre fontosabb szerepet játszanak a decentralizált pénzügyi rendszerek védelmében.

Ez is érdekelhet: Tokenizált ingatlanbefektetés Paraguayban: 6 millió dolláros projekt a Polkadot hálózatán

A hidak, mint a DeFi leggyengébb pontjai

Az eset ismét ráirányítja a figyelmet egy régóta ismert problémára: a blokklánc-hidak sérülékenységére. Ezek a rendszerek kulcsszerepet játszanak a több láncot összekötő ökoszisztémákban, ugyanakkor technikailag rendkívül összetettek.

A hidak működéséhez gyakran szükség van bizalmi feltételezésekre vagy köztes mechanizmusokra, amelyek eltérnek a blokkláncok eredeti, bizalommentes filozófiájától. Ez a kompromisszum pedig támadási felületet teremt.

Az elmúlt években több milliárd dollárnyi veszteség származott hasonló incidensekből, ami jól mutatja, hogy a probléma nem egyedi. A mostani eset különlegessége inkább abban rejlik, hogy a támadó nem tudta teljes mértékben kihasználni a hibát.

Egy fontos tanulság a piac számára

Ez az incidens jól példázza a kriptovilág egyik alapvető sajátosságát: a technológiai hibák hatalmas elméleti veszteségeket okozhatnak, de a valós károk gyakran attól függnek, mennyire gyorsan reagál a piac a közösség.

Az, hogy valaki képes egymilliárd dollárnyi hamis tokent létrehozni, komoly figyelmeztetés a fejlesztők számára. Ugyanakkor az is biztató jel, hogy a rendszer bizonyos szinten önvédelmi mechanizmusokkal rendelkezik, például a likviditás és a piaci bizalom révén.

A jövőben várhatóan még nagyobb hangsúly kerül a hidak biztonságára és az ilyen típusú sebezhetőségek megelőzésére, hiszen a több láncot összekötő megoldások szerepe folyamatosan nő a decentralizált pénzügyek világában.

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Deadspin | Astros place SS Jeremy Pena, RHP Tatsuya Imai on IL <div id=""><section id="0" class=" w-full"><div class="xl:container mx-0 !px-4 py-0 pb-4 !mx-0 !px-0"><img src="https://images.deadspin.com/tr:w-900/27134538.jpg" srcset="https://images.deadspin.com/tr:w-900/27134538.jpg" alt="MLB: Seattle Mariners at Houston Astros" class="w-full" fetchpriority="high" loading="eager"/><span class="text-0.8 leading-tight">Sep 20, 2025; Houston, Texas, USA; Houston Astros shortstop Jeremy Pena (3) reacts after a play during the sixth inning against the Seattle Mariners at Daikin Park. Mandatory Credit: Troy Taormina-Imagn Images<!-- --> <!-- --> </span></div></section><section id="section-1"> <p>The Houston Astros placed shortstop Jeremy Pena and right-hander Tatsuya Imai on the injured list Monday.</p> </section><section id="section-2"> <p>Right-hander Jayden Murray was optioned to Triple-A Sugar Land, while right-hander J.P France, left-hander Colton Gordon and infielder Shay Whitcomb all were recalled from Triple-A.</p> </section><section id="section-3"> <p>Pena, 28, sustained a Grade 1 hamstring strain in Saturday’s 8-7 road loss to the Seattle Mariners. He is batting .256 with four doubles in 10 games this season and is a career .271 hitter with 64 home runs and 247 RBIs in 578 career games in Houston since 2022.</p> </section><br/><section id="section-4"> <p>Imai, 27, is dealing with right arm fatigue. He’s 1-0 with a 7.27 ERA in three starts for Houston after arriving from Japan this past offseason on a three-year, $54 million deal. </p> </section> <section id="section-5"> <p>France, 31, had just been optioned to Sugar Land, and returns after allowing four runs on three hits and four walks in his season debut Friday against the Mariners. He is 12-9 with a 4.49 ERA in 32 appearances (28 starts) with Houston since 2023.</p> </section><section id="section-6"> <p>Gordon, 27, made 20 appearances (14 starts) for the Astros last season, going 6-4 with a 5.34 ERA. Whitcomb, 27, is batting .173 with one home run and six RBIs in 42 games with Houston over the past three seasons.</p> </section><section id="section-7"> <p>–Field Level Media</p> </section></div> #Deadspin #Astros #place #Jeremy #Pena #RHP #Tatsuya #Imai

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Mirabai Chanu’s unfinished business before the big switch <div id="content-body-70818629" itemprop="articleBody"><p>She might be India’s greatest-ever weightlifter, but Mirabai Chanu doesn’t demand any special favours at the end of a morning training session at the Weightlifting Warriors gym in Modinagar, just outside New Delhi. Having hoisted hundreds of kilos of iron weights, several tonnes in total, during an hour-and-a-half session, overhead, the Olympic medallist now pulls the same weights off her barbell and back onto the racks.</p><p>But where most of the other elite international weightlifters at this gym, operated by national coach Vijay Sharma, stop at this point, Mirabai isn’t done after the last plate is put away. She takes a cloth and wipes off the barbell, removing the white chalk deposited from her palms over the course of dozens of lifts in the training session.</p><p>She doesn’t think much of it.</p><p>“I’ve always done this,” she tells  <i>Sportstar</i> later. “I consider the barbell nothing less than the weapon a soldier carries into battle. Just like he keeps his weapon clean, I also have to maintain my equipment. I also have to be an example to younger weightlifters,” she says.</p><p>Since beginning her international career in 2014, Mirabai has faced her share of challenges and built a record that will be hard to emulate.</p><p>Having already won titles at the World Championships, medals at the Asian Championships, Commonwealth Games and, of course, an Olympic silver, Mirabai has shown few signs of slowing down. Last year, she won another world medal, a silver in the women’s 48kg category. Then, at the National Championships in February this year, she lifted a Personal Best of 89kg in the snatch. She followed that with a 116kg lift in the clean and jerk to total 205kg, equalling her Personal Best recorded at the 2021 Asian Championships in the 49kg category.</p><div class="verticle article-picture center"><img src="https://ss-i.thgim.com/public/incoming/irtm91/article70857916.ece/alternates/FREE_1200/IMG_GettyImages-13303325_2_1_89CUKK8L.jpg" data-original="https://ss-i.thgim.com/public/incoming/irtm91/article70857916.ece/alternates/FREE_1200/IMG_GettyImages-13303325_2_1_89CUKK8L.jpg" alt="Mirabai Chanu created history by winning India’s first-ever weightlifting silver medal in the Olympics, after lifting a total of 202 kg in the women’s 49 kg event at the Tokyo 2020 Olympic Games" title="Mirabai Chanu created history by winning India’s first-ever weightlifting silver medal in the Olympics, after lifting a total of 202 kg in the women’s 49 kg event at the Tokyo 2020 Olympic Games" class=" lazy" width="100%" height="100%"/><div class="pic-caption"><figcaption class="figure-caption align-text-bottom"><p> Mirabai Chanu created history by winning India’s first-ever weightlifting silver medal in the Olympics, after lifting a total of 202 kg in the women’s 49 kg event at the Tokyo 2020 Olympic Games | Photo Credit: Getty Images </p><img class="caption-image" src="https://assetsss.thehindu.com/theme/images/SSRX/lightbox-info.svg" alt="lightbox-info"/></figcaption></div><p class="caption"> Mirabai Chanu created history by winning India’s first-ever weightlifting silver medal in the Olympics, after lifting a total of 202 kg in the women’s 49 kg event at the Tokyo 2020 Olympic Games | Photo Credit: Getty Images </p></div><p><b>Tough phase</b></p><p>While she is in strong form, Mirabai knows this phase will be among her toughest. Last year, the International Weightlifting Federation announced that weight categories for the 2028 Los Angeles Olympics were being rejigged. The lightest women’s category, 49kg, in which Mirabai has competed for most of the last decade and won silver at the Tokyo Olympics, was dropped from the Olympic programme.</p><p>She will have no choice but to move up to the 53kg division. She plans to first compete in this higher category at the 2026 Asian Games in Tokyo. But she has unfinished business first. Mirabai will compete in the 48kg category at both the upcoming Asian Championships and Commonwealth Games. She has already won two gold medals in this category at the latter (2018, 2022) and wants to sign off with another.</p><p>“The Commonwealth Games will be my last competition in the 48kg category. I want to leave this category by doing something special. I think I am in good shape for this. Last year, after the Olympic weight categories were changed, I had to move down to the 48kg class. In the new IWF categories, the 48kg class is the lightest, although it is not an Olympic category. But even after I started competing in this class, my performance is the same as in the 49kg category, and in some ways even better,” she says.</p><p>“In my last competition, I want to do better than I’ve ever done at the Commonwealth Games. When I analyse my training, I think my performance is going really well. I already hold the Commonwealth record and will try to achieve even more.”</p><p>She has a number in mind: a 90kg snatch and a 120kg clean and jerk.</p><p><b>Increased confidence</b></p><p>“I got a lot of confidence from the National Championships. I lifted 89kg in the snatch on my second attempt. Then I attempted 91kg in my third. I’ve never attempted anything above 90kg in training. So even though I didn’t complete the lift, it gives me confidence to simply attempt that weight in competition. It’s the same with the clean and jerk. I’ve never touched 120kg in training before attempting it in competition. Now I know what that weight feels like.</p><p>“I keep a diary of my lifts where I write that I can cross 90kg in the snatch and 120kg in the clean and jerk. I know I am getting close,” she says.</p><p>At the 2025 World Championships DPR Korea’s Kang Hyon-gyong had won gold with a combined lift of 214kg.</p><p>Mirabai’s confidence, she says, comes not just from attempting the biggest weights of her career but also from staying injury-free for much of the past couple of years.</p><div class=" article-picture center"><img src="https://ss-i.thgim.com/public/incoming/3100o4/article70857926.ece/alternates/FREE_1200/Weightlifting%20Warriors%20Academy%20Modinagar%2015.JPG" data-original="https://ss-i.thgim.com/public/incoming/3100o4/article70857926.ece/alternates/FREE_1200/Weightlifting%20Warriors%20Academy%20Modinagar%2015.JPG" alt="Mirabai began her 2026 season at the National Weightlifting Championships in February and set three new national records in the women’s 48kg category." title="Mirabai began her 2026 season at the National Weightlifting Championships in February and set three new national records in the women’s 48kg category." class=" lazy" width="100%" height="100%"/><div class="pic-caption"><figcaption class="figure-caption align-text-bottom"><p> Mirabai began her 2026 season at the National Weightlifting Championships in February and set three new national records in the women’s 48kg category. | Photo Credit: SHASHI SHEKHAR KASHYAP </p><img class="caption-image" src="https://assetsss.thehindu.com/theme/images/SSRX/lightbox-info.svg" alt="lightbox-info"/></figcaption></div><p class="caption"> Mirabai began her 2026 season at the National Weightlifting Championships in February and set three new national records in the women’s 48kg category. | Photo Credit: SHASHI SHEKHAR KASHYAP </p></div><p>“In my career, I’ve suffered a lot of injuries to my joints, wrists and shoulders. But I’ve been working on my technique, especially in the first and second pull of the snatch and how I receive the bar overhead. All this has helped me avoid injuries,” she says.</p><p>Mirabai has another goal this year: a medal at the Asian Games. For all her accomplishments, she has never medalled at the continental event. Her closest finish was fourth at Hangzhou.</p><p>“I’ve never won a medal at the Asian Games. I’ve done everything else. This is the one medal I don’t have. More than anything, that’s my target this year,” she says.</p><p>While the Asian Games may be seen as a stepping stone to the 2028 Olympics, Mirabai isn’t looking that far ahead.</p><p>“As of now, I’m focused on the Asian Games. Only after that will I think about the Olympic weight category. Of course, I want to go to the Olympics, but I will see how my body responds at the Asian Games. If it adapts well to the new category, I will have more confidence,” she says.</p><p><b>Difficult shift</b></p><p>The move to the 53kg division will be challenging. At 4’11, Mirabai will not find it easy to add the additional 5kg of muscle mass, more than 10 per cent of her body weight, that she will need.</p><p>The level of competition will also be higher. At last year’s World Championships, the bronze-medal total was 200kg, compared to 198kg in the women’s 48kg category. The number could have been higher had China’s Du Meiyuan not withdrawn due to injury.</p><p>Additionally, many of her competitors have already been preparing for the 53kg category, while Mirabai will only transition after the Commonwealth Games.</p><p>Yet, she isn’t overly concerned. Lifting 205kg at her current body weight gives her confidence that she can lift more with additional muscle.</p><div class=" article-picture center"><img src="https://ss-i.thgim.com/public/incoming/nb8ych/article70857930.ece/alternates/FREE_1200/Weightlifting%20Warriors%20Academy%20Modinagar%2027.JPG" data-original="https://ss-i.thgim.com/public/incoming/nb8ych/article70857930.ece/alternates/FREE_1200/Weightlifting%20Warriors%20Academy%20Modinagar%2027.JPG" alt="At 31, Mirabai knows she is in the latter stages of her career, but she is determined to push as long as she can. “As long as I have that motivation, I’ll keep fighting,” she says." title="At 31, Mirabai knows she is in the latter stages of her career, but she is determined to push as long as she can. “As long as I have that motivation, I’ll keep fighting,” she says." class=" lazy" width="100%" height="100%"/><div class="pic-caption"><figcaption class="figure-caption align-text-bottom"><p> At 31, Mirabai knows she is in the latter stages of her career, but she is determined to push as long as she can. “As long as I have that motivation, I’ll keep fighting,” she says. | Photo Credit: SHASHI SHEKHAR KASHYAP </p><img class="caption-image" src="https://assetsss.thehindu.com/theme/images/SSRX/lightbox-info.svg" alt="lightbox-info"/></figcaption></div><p class="caption"> At 31, Mirabai knows she is in the latter stages of her career, but she is determined to push as long as she can. “As long as I have that motivation, I’ll keep fighting,” she says. | Photo Credit: SHASHI SHEKHAR KASHYAP </p></div><p>She is, in fact, looking forward to one aspect of the transition.</p><p>“I’ve been 48–49kg for many years. One of the hardest things was constantly controlling what I ate. It took a lot of motivation to remind myself why I was doing it.</p><p>“After the Tokyo Olympics, Domino’s gave me a free pizza-for-life deal, but I never really used it because I couldn’t eat it! So one thing I’m looking forward to is eating a bit more,” she says.</p><p>For now, she remains focused. At 31, she knows she is in the latter stages of her career, but she is determined to push as long as she can.</p><p>“People say that in sport you start deteriorating with age. That may be true. But I believe motivation matters just as much. Every competition motivates me. It shows me the way forward and reminds me of the work I’ve put in over the years.</p><p>“As long as I have that motivation, I’ll keep fighting,” she says.</p><p class="publish-time" id="end-of-article">Published on Apr 13, 2026</p><h3 class="title-patch">More stories from this issue</h3></div> #Mirabai #Chanus #unfinished #business #big #switch

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