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Ubuntu曝安全绕过风险 需手动加固

安全公司Qualys发现Ubuntu Linux存在三处安全绕过问题,允许本地无权限用户绕过其对用户命名空间的限制,从而在隔离环境中获得管理权限。这些问题影响启用了相关限制的Ubuntu 23.10及默认启用的24.04版本。

攻击者可通过利用aa-execbusyboxLD_PRELOAD等方式绕过AppArmor防护机制。虽然这些绕过本身不足以完全控制系统,但可能被用来辅助利用其他需要高权限的内核漏洞,构成潜在风险。

Canonical公司已确认此发现,但将其视为深度防御机制的局限性,而非紧急漏洞。因此,官方建议用户采取手动加固措施,并计划在未来版本中改进防护。

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Ubuntu曝安全绕过风险 需手动加固

安全公司Qualys发现Ubuntu Linux存在三处安全绕过问题,允许本地无权限用户绕过其对用户命名空间的限制,从而在隔离环境中获得管理权限。这些问题影响启用了相关限制的Ubuntu 23.10及默认启用的24.04版本。

攻击者可通过利用aa-execbusyboxLD_PRELOAD等方式绕过AppArmor防护机制。虽然这些绕过本身不足以完全控制系统,但可能被用来辅助利用其他需要高权限的内核漏洞,构成潜在风险。

Canonical公司已确认此发现,但将其视为深度防御机制的局限性,而非紧急漏洞。因此,官方建议用户采取手动加固措施,并计划在未来版本中改进防护。

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Export WhatsApp stickers to Telegram on Android

From the Files app, scroll down to Internal storage, and tap on WhatsApp. Once you’re there, go to Media and then WhatsApp Stickers. Don’t be surprised if you find a large number of files in that folder—it holds your personal collection of stickers and every one you’ve ever received. Even the bad ones.Tap the three dots in the top right corner of your screen to Select all. If you want to trim the fat and grab only the best of the best, this is the perfect time to do so: choose the ones you want to export by long-pressing one file to activate selection mode, and then tapping on the rest. Once you’re done, hit the Share button (that “less than”-like symbol at the top of your screen). If you have a big collection—more than 500 stickers, for example—it’s possible that nothing will happen when you tap the Share button. Be patient—your phone’s just struggling with a heavy load.On the menu that pops from the bottom of the screen, choose Telegram, and then select the chat named Saved messages. This is a chat only you can see, and it will serve as your sticker bank. Unlike WhatsApp, Telegram doesn’t store your favorite stickers in a quick-access reservoir right beside the typing field, but you’ll be able to snatch them out of your Saved messages chat and forward them to any of your Telegram contacts. This also means you won’t have a quick way to save incoming stickers like you did on WhatsApp, so you’ll have to forward them from one chat to the other.

How to Buy Bitcoin?

Most people buy Bitcoin via exchanges, such as Coinbase. Exchanges allow you to buy, sell and hold cryptocurrency, and setting up an account is similar to opening a brokerage account—you’ll need to verify your identity and provide some kind of funding source, such as a bank account or debit card. Major exchanges include Coinbase, Kraken, and Gemini. You can also buy Bitcoin at a broker like Robinhood. Regardless of where you buy your Bitcoin, you’ll need a digital wallet in which to store it. This might be what’s called a hot wallet or a cold wallet. A hot wallet (also called an online wallet) is stored by an exchange or a provider in the cloud. Providers of online wallets include Exodus, Electrum and Mycelium. A cold wallet (or mobile wallet) is an offline device used to store Bitcoin and is not connected to the Internet. Some mobile wallet options include Trezor and Ledger.

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