2023-07-24 Hacker News Top Articles and Its Summaries
1. Zenbleed Total comment counts : 31 Summary The article discusses a vulnerability discovered by Tavis Ormandy from Google Information Security. The vulnerability affects all Zen 2 class processors and allows attackers to spy on operations, such as strlen, memcpy, and strcmp, that use vector registers. The vulnerability is triggered by utilizing the XMM Register Merge Optimization, a register rename, and a mispredicted vzeroupper instruction. By exploiting this vulnerability, an attacker can monitor encryption keys and passwords as users log in....