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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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Should I buy bitcoin?

“To the extent it is used I fear it’s often for illicit finance. It’s an extremely inefficient way of conducting transactions, and the amount of energy that’s consumed in processing those transactions is staggering,” the former Fed chairwoman said. Yellen’s comments have been cited as a reason for bitcoin’s recent losses. However, Yellen’s assessment of bitcoin as a inefficient medium of exchange is an important point and one that has already been raised in the past by bitcoin bulls. Using a volatile asset in exchange for goods and services makes little sense if the asset can tumble 10% in a day, or surge 80% over the course of a two months as bitcoin has done in 2021, critics argue. To put a finer point on it, over the past 12 months bitcoin has registered 8 corrections, defined as a decline from a recent peak of at least 10% but not more than 20%, and two bear markets, which are defined as falls of 20% or more, according to Dow Jones Market Data.

NEWS: Telegram supports Facetime video calls NOW!

Secure video calling is in high demand. As an alternative to Zoom, many people are using end-to-end encrypted apps such as WhatsApp, FaceTime or Signal to speak to friends and family face-to-face since coronavirus lockdowns started to take place across the world. There’s another option—secure communications app Telegram just added video calling to its feature set, available on both iOS and Android. The new feature is also super secure—like Signal and WhatsApp and unlike Zoom (yet), video calls will be end-to-end encrypted.

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