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DoS Bug Identified in Ethereum’s Geth Software on Eve of Hard Fork

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Developers have identified a denial-of-service (DoS) vulnerability on Ethereum’s Geth software, prompting them to release a new version on the eve of the Byzantium upgrade.

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Geth Developers Publish New Software

It didn’t take long for the Geth team to neutralize the bug by releasing Urgent Update v1.7.2, a hotfix release to address the DoS vulnerability in the EVM.

“Please upgrade before block 4_370_000!” karalabe wrote on the Go Ethereum Github page.

Analysts say the vulnerability stems from an oversight in one of Byzantium’s new features. Left unchecked, the bug could be exploited by an attacker who wants to take the network nodes offline.

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Geth is Ethereum’s most popular client, representing roughly 75% of all system nodes.

On Friday, Ethereum’s second-biggest software client Parity issued a new software upgrade to correct a so-called “consensus bug.” The error could have caused the network to split during the hard fork.

Hard Fork on the Horizon

The hard fork for Byzantium, which is the first leg in the long-awaited Metropolis upgrade, will occur at block 4,370,000. The fork is expected to occur Sunday evening. The development community remains generally optimistic that the upgrade will occur in unison across all clients, thus assuring no unintended splits.

Although hard forks have a negative connotation for bitcoin, they are generally seen as a positive for ether. That’s because the Ethereum community favors hard forks over their softer versions when it comes to implementing much needed updates. Ethereum creator Vitalik Buterin has explained previously that hard forks offer numerous advantages with respect to blockchain network upgrades. He event went as far as describing soft forks as a “dangerous game.”

Ether prices are holding above $340 on the eve of the expected fork, bringing the total market cap closer to $32.5 billion. Prices are up more than $40 from the Friday low near $301.

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Cryptocurrency Analysis: Ripple Continues Rampage as Litecoin and Ethereum Enter Correction

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Ripple remained in the center of attention in the segment after breaking out to a new all-time high yesterday, and the coin almost doubled in value, climbing above the $0.80 level. The currency concluded a 6-month long consolidation pattern with the move after being the only major on a long-term buy signal in our trend model.

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XRP gave a short-term sell signal today, while turning neutral regarding the long-term setup. Investors now shouldn’t add to their positions, although further gains are still possible, and reducing holdings somewhat is a good idea here. Major support is still found at the prior high near $0.4250 and in the $0.30-$0.32 range.

XRP/USDT, 4-Hour Chart Analysis

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While Bitcoin stagnated, and Bitcoin Cash jumped, Ethereum, Litecoin, Dash, and IOTA has been drifting slightly lower, although the recent gains are still mostly intact, and the basic setup in the segment is unchanged.

Litecoin fell below the $300 level after yesterday’s consolidation, and the coin faced strong selling pressure in the latter half of the session. The currency remains extremely stretched regarding the long-term momentum indicators, and although the short-term uptrend is still intact, a deeper correction is likely in the coming weeks, with key support levels found at $125 and $100, and weaker levels at $260 and $170.

LTC/USD, 4-Hour Chart Analysis

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Altcoins

Trade Recommendation: XMR/BTC Pair Throwback

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The XMR/BTC market (Monero) has been in downtrend on the hourly chart after posting a high of 0.0225 on December 6 and failing to hold critical support at 0.02. It went to as low as 0.0145 on December 8 before respecting RSI at 32 where it established support. The market used the new support level to rally and generate one higher low after the other. It recently attempted to reclaim support at 0.02 but was repelled by bears. Currently, the market is trading around 0.019 levels where it appears to have created another higher low.

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Technical analysis shows a large reversal pattern in the hourly chart that can take the XMR/BTC pair to 0.025. Even though the market failed to breach resistance at 0.02, investors should not see it as a failed breakout. What we’re seeing is a throwback which is a temporary retreat in price. Throwbacks are common in breakout plays and are often seen as a bullish signal. The next time the market attempts to breach 0.02 resistance, it has a much better chance of breaking it with conviction.

The strategy is to buy breakout at 0.02 with immediate stop at 0.0189.

Hourly XMR/BTC Chart on Poloniex

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As of this writing, XMR/BTC is trading at 0.018714 on Poloniex.

Summary of Strategy

Buy: breakout at 0.02

Target: 0.025

Stop: move below 0.0189 after buying breakout at 0.02.

Disclaimer: The writer owns bitcoin, Ethereum and other cryptocurrencies. He holds investment positions in the coins, but does not engage in short-term or day-trading.

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Altcoins

Trade Recommendation: FCT/BTC Bullish Reversal

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The market reach its all-time high back in June this year when FTC/BTC (Factom) reached 0.01463162. Unfortunately, the pair wasn’t able to sustain its momentum. It created a lower high several days later at 0.01066744 which signalled investors to take profits or cut their losses. As a result, the market tumbled and lost 93.17% in value from its all-time high. Such a tremendous loss would have created an atmosphere of despair in the market. Usually, that’s when the savviest traders come in.

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Technical analysis reveals that the worst is behind the pair. FCT/BTC touched support at 0.001 on the daily chart twice and respected it on both occasions. This is a good indication that the market has found a reliable support level. In addition, hourly chart shows that a large reversal pattern is underway. The pair may have retreated when it nearly touched 0.002, but it generated a new higher low in the process at 0.00156566. The throwback is a bullish signal that enables the pair to gather momentum to break resistance at 0.002.

The strategy is buy on breakout at 0.002. Breach that level and the market reclaims 0.003. Sell that level because it is a strong resistance.

Hourly FCT/BTC Chart on Poloniex

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As of this writing, FCT/BTC is trading at 0.001738 on Poloniex.

Summary of Strategy

Buy: breakout at 0.002

Target: 0.003

Stop: move below 0.0018 after buying breakout at 0.002.  

 

Disclaimer: The writer owns bitcoin, Ethereum and other cryptocurrencies. He holds investment positions in the coins, but does not engage in short-term or day-trading.

Featured image courtesy of Shutterstock.

Important: Never invest money you can't afford to lose. Always do your own research and due diligence before placing a trade. Read our Terms & Conditions here.



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