{"id":1485,"date":"2022-03-15T14:52:38","date_gmt":"2022-03-15T14:52:38","guid":{"rendered":"https:\/\/scienceandnerds.com\/2022\/03\/15\/intels-amd-bug-find-proves-that-spectre-is-still-looming-over-us\/"},"modified":"2022-03-15T14:52:40","modified_gmt":"2022-03-15T14:52:40","slug":"intels-amd-bug-find-proves-that-spectre-is-still-looming-over-us","status":"publish","type":"post","link":"https:\/\/scienceandnerds.com\/2022\/03\/15\/intels-amd-bug-find-proves-that-spectre-is-still-looming-over-us\/","title":{"rendered":"Intel\u2019s AMD bug find proves that Spectre is still looming over us"},"content":{"rendered":"<p>Source: <a href=\"https:\/\/www.theverge.com\/2022\/3\/15\/22977989\/intel-amd-bug-spectre\">https:\/\/www.theverge.com\/2022\/3\/15\/22977989\/intel-amd-bug-spectre<\/a><br \/>\n<code><br \/><\/br><\/code><\/p>\n<div readability=\"56.479187817259\">\n<p id=\"yk0WDh\">When doing some of its own research, Intel\u2019s security team discovered a flaw in AMD\u2019s years-old patch against Spectre-based vulnerabilities, according to a report by <a href=\"https:\/\/www.tomshardware.com\/news\/intel-amd-spectre-v2-vulnerability-mitigation-bug-fix-patch-cpu-security\"><em>Tom\u2019s Hardware<\/em><\/a>. AMD has since provided an update <a href=\"https:\/\/www.amd.com\/en\/corporate\/product-security\/bulletin\/amd-sb-1036\">on its security bulletin in response<\/a>, where it suggests using an alternate mitigation option and has additional advice for software developers.<\/p>\n<div class=\"c-float-right\">\n<aside id=\"rK4ejy\"><q>AMD\u2019s years-old fix doesn\u2019t adequately protect against Spectre<\/q><\/aside>\n<\/div>\n<p id=\"JYYBgm\">Spectre is a type of security flaw affecting nearly all modern Intel and AMD processors that can give attackers access to sensitive data while remaining undetected. Last week, researchers found that Intel and Arm processors are <a href=\"https:\/\/www.tomshardware.com\/news\/intel-alder-lake-arm-cpus-affected-by-new-spectre-vulnerability\">susceptible to a new kind of Spectre v2 attack<\/a> \u2014 although it\u2019s just a proof-of-concept \u2014 called Branch History Injection (BHI). <\/p>\n<p id=\"8ZBgWf\">During Intel\u2019s investigation of this new potential vulnerability, Intel examined AMD\u2019s LFENCE\/JMP Spectre mitigation that the company has used since 2018. Surprisingly, <a href=\"https:\/\/arxiv.org\/abs\/2203.04277\">researchers found<\/a> that it doesn\u2019t adequately protect against the threat. As noted on AMD\u2019s security bulletin, the newly discovered security hole spans generations of AMD Ryzen processors on both laptops and desktop builds and also affects the second and third-generation Threadrippers. The researchers who found the new flaw performed their exploit on a Linux system and <a href=\"https:\/\/www.vusec.net\/projects\/bhi-spectre-bhb\/\">recommended mitigations<\/a>, including the Retpoline fixes and disabling unprivileged eBPF on Linux systems that don\u2019t already have it disabled. So far, there haven\u2019t been examples of using the exploit on other platforms like Windows.<\/p>\n<p id=\"g3qmiL\">Patches for Spectre-related vulnerabilities have been known to cause performance issues, especially on older hardware. The folks at benchmarking platform <a href=\"https:\/\/www.phoronix.com\/scan.php?page=article&#038;item=amd-zen2-spectre&#038;num=1\">Phoronix<\/a> tested the impact of the initial patches on both AMD and Intel chips in 2019 and discovered Intel chips are far more likely to be bogged down by performance issues thanks to their patches, while AMD CPUs remain much less affected.<\/p>\n<\/div>\n<p><code><br \/><\/br><\/code><\/p>\n<p>Source: <a href=\"https:\/\/www.theverge.com\/2022\/3\/15\/22977989\/intel-amd-bug-spectre\">https:\/\/www.theverge.com\/2022\/3\/15\/22977989\/intel-amd-bug-spectre<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Source: When doing some of its own research, Intel\u2019s security team discovered a flaw in AMD\u2019s years-old patch against Spectre-based vulnerabilities, according to a report by Tom\u2019s Hardware. AMD has since provided an update on its security bulletin in response, where it suggests using an alternate mitigation option and has additional advice for software developers. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1486,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","om_disable_all_campaigns":false,"pagelayer_contact_templates":[],"_pagelayer_content":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[17,8],"tags":[18],"class_list":["post-1485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","category-technology","tag-tech"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Intel\u2019s AMD bug find proves that Spectre is still looming over us - Science and Nerds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scienceandnerds.com\/2022\/03\/15\/intels-amd-bug-find-proves-that-spectre-is-still-looming-over-us\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Intel\u2019s AMD bug find proves that Spectre is still looming over us - Science and Nerds\" \/>\n<meta property=\"og:description\" content=\"Source: When doing some of its own research, Intel\u2019s security team discovered a flaw in AMD\u2019s years-old patch against Spectre-based vulnerabilities, according to a report by Tom\u2019s Hardware. 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