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heise online English<p>UEFI BIOS flaws: SecureBoot bypass and firmware replacement possible</p><p>By using insecure NVRAM variables, many UEFI BIOS versions allow SecureBoot to be bypassed or the firmware to be replaced.</p><p><a href="https://www.heise.de/en/news/UEFI-BIOS-flaws-SecureBoot-bypass-and-firmware-replacement-possible-10440432.html?wt_mc=sm.red.ho.mastodon.mastodon.md_beitraege.md_beitraege&utm_source=mastodon" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">heise.de/en/news/UEFI-BIOS-fla</span><span class="invisible">ws-SecureBoot-bypass-and-firmware-replacement-possible-10440432.html?wt_mc=sm.red.ho.mastodon.mastodon.md_beitraege.md_beitraege&utm_source=mastodon</span></a></p><p><a href="https://social.heise.de/tags/BIOS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BIOS</span></a> <a href="https://social.heise.de/tags/Firmware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Firmware</span></a> <a href="https://social.heise.de/tags/IT" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>IT</span></a> <a href="https://social.heise.de/tags/Security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Security</span></a> <a href="https://social.heise.de/tags/Sicherheitsl%C3%BCcken" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sicherheitslücken</span></a> <a href="https://social.heise.de/tags/UEFI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UEFI</span></a> <a href="https://social.heise.de/tags/news" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>news</span></a></p>
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#uefi
10 posts · 9 participants · 0 posts today
AskUbuntu<p>Can Windows trigger BIOS/UEFI firmware updates if I'm only booting Ubuntu? <a href="https://ubuntu.social/tags/dualboot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dualboot</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a></p><p><a href="https://askubuntu.com/q/1550491/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1550491/612</span><span class="invisible"></span></a></p>
Piratenpartei Leipziger Umland<p><span class="h-card" translate="no"><a href="https://social.heise.de/@heisec" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>heisec</span></a></span><br>die wievielte Meldung einer UEFI Lücke ist das in diesen Jahr schon?<br><a href="https://piraten-partei.social/tags/omg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>omg</span></a> <a href="https://piraten-partei.social/tags/Bios" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Bios</span></a> <a href="https://piraten-partei.social/tags/firmware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>firmware</span></a> <a href="https://piraten-partei.social/tags/it" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>it</span></a> <a href="https://piraten-partei.social/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://piraten-partei.social/tags/sicherheitslucken" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sicherheitslucken</span></a> <a href="https://piraten-partei.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://piraten-partei.social/tags/News" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>News</span></a></p>
heise Security<p>UEFI-BIOS-Lücken: SecureBoot-Umgehung und Firmware-Austausch möglich</p><p>Durch Nutzung unsicherer NVRAM-Variablen ermöglichen viele UEFI-BIOS-Versionen das Umgehen von SecureBoot oder Austausch der Firmware.</p><p><a href="https://www.heise.de/news/UEFI-BIOS-Luecken-SecureBoot-Umgehung-und-Firmware-Austausch-moeglich-10440016.html?wt_mc=sm.red.ho.mastodon.mastodon.md_beitraege.md_beitraege&utm_source=mastodon" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">heise.de/news/UEFI-BIOS-Luecke</span><span class="invisible">n-SecureBoot-Umgehung-und-Firmware-Austausch-moeglich-10440016.html?wt_mc=sm.red.ho.mastodon.mastodon.md_beitraege.md_beitraege&utm_source=mastodon</span></a></p><p><a href="https://social.heise.de/tags/BIOS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BIOS</span></a> <a href="https://social.heise.de/tags/Firmware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Firmware</span></a> <a href="https://social.heise.de/tags/IT" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>IT</span></a> <a href="https://social.heise.de/tags/Security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Security</span></a> <a href="https://social.heise.de/tags/Sicherheitsl%C3%BCcken" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sicherheitslücken</span></a> <a href="https://social.heise.de/tags/UEFI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UEFI</span></a> <a href="https://social.heise.de/tags/news" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>news</span></a></p>
postmodern<p>What is the magic command to create an <code>.iso</code> that is both bootable by UEFI and BIOS (CSM) systems? Trying to re-build a Ubuntu <code>.iso</code> and cannot get the modified <code>.iso</code> to boot under OVMF; I did verify that OVMF can boot an unmodified Ubuntu <code>.iso</code>.</p><p><a href="https://infosec.exchange/tags/ubuntu" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ubuntu</span></a> <a href="https://infosec.exchange/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://infosec.exchange/tags/efi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>efi</span></a> <a href="https://infosec.exchange/tags/iso" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>iso</span></a> <a href="https://infosec.exchange/tags/xorriso" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>xorriso</span></a> <a href="https://infosec.exchange/tags/genisoimage" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>genisoimage</span></a></p>
Habr 25+<p>Hydroph0bia (CVE-2025-4275) — тривиальный обход SecureBoot в UEFI-совместимых прошивках на базе платформы Insyde H2O</p><p>Здравствуй, читатель. В этой статье я расскажу про найденную мной не так давно серьезную уязвимость в UEFI -совместимых прошивках на базе платформы Insyde H2O , которая присутствует в них примерно с 2012 года и (на большинстве существующих ныне систем) продолжает присутствовать. Уязвимость эта позволяет надежно (и незаметно для средств мониторинга стандартных переменных UEFI SecureBoot вроде db , KEK и PK ) обойти механизм проверки подписей UEFI-драйверов и UEFI-загрузчиков, а для её успешной эксплуатации требуется только возможность записи в UEFI NVRAM (доступная и в Windows, и в Linux после локального повышения привилегий). Я категорически не советую использовать полученные из этой статьи сведения для совершения каких-либо противоправных действий, всю полученную информацию вы используете на свой страх и риск.</p><p><a href="https://habr.com/ru/articles/916268/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">habr.com/ru/articles/916268/</span><span class="invisible"></span></a></p><p><a href="https://zhub.link/tags/UEFI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UEFI</span></a> <a href="https://zhub.link/tags/insyde" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>insyde</span></a> <a href="https://zhub.link/tags/%D1%83%D1%8F%D0%B7%D0%B2%D0%B8%D0%BC%D0%BE%D1%81%D1%82%D1%8C" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>уязвимость</span></a></p>
AskUbuntu<p>I have been trying to install ubuntu server in my old acer aspire 15 laptop and i get , no bootable device <a href="https://ubuntu.social/tags/boot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>boot</span></a> <a href="https://ubuntu.social/tags/server" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>server</span></a> <a href="https://ubuntu.social/tags/systeminstallation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>systeminstallation</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a></p><p><a href="https://askubuntu.com/q/1550375/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1550375/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>First Windows then Ubuntu options disappear from the UEFI on dual-boot laptop <a href="https://ubuntu.social/tags/boot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>boot</span></a> <a href="https://ubuntu.social/tags/dualboot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dualboot</span></a> <a href="https://ubuntu.social/tags/grub2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>grub2</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://ubuntu.social/tags/windows" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>windows</span></a></p><p><a href="https://askubuntu.com/q/1550371/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1550371/612</span><span class="invisible"></span></a></p>
Stephen Hoffman<p>For the ~six of y’all that might be interested in the GUID partitioning table storage partitioning — used on many modern systems including macOS, OpenVMS I64 on Integrity Itanium, most anything using EFI or UEFI consoles, and others — here is the Apple Technical Note TN2166<br>Secrets of the GPT document:</p><p><a href="https://developer.apple.com/library/archive/technotes/tn2166/_index.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">developer.apple.com/library/ar</span><span class="invisible">chive/technotes/tn2166/_index.html</span></a></p><p>This being one of the better GPT introductions available.</p><p>This and related technical discussions also have all unfortunately been buried by that unrelated AI stuff.</p><p><a href="https://infosec.exchange/tags/efi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>efi</span></a> <a href="https://infosec.exchange/tags/macos" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>macos</span></a> <a href="https://infosec.exchange/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://infosec.exchange/tags/gpt" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gpt</span></a> <a href="https://infosec.exchange/tags/openvms" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>openvms</span></a></p>
AskUbuntu<p>displaylink - complete removal <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://ubuntu.social/tags/displaylink" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>displaylink</span></a></p><p><a href="https://askubuntu.com/q/1550231/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1550231/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>Ubuntu keeps reinstalling every time I boot up my laptop <a href="https://ubuntu.social/tags/partitioning" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>partitioning</span></a> <a href="https://ubuntu.social/tags/grub2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>grub2</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a></p><p><a href="https://askubuntu.com/q/1549976/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549976/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>Deleted Ubuntu partition from Windows 11 dual boot <a href="https://ubuntu.social/tags/dualboot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dualboot</span></a> <a href="https://ubuntu.social/tags/partitioning" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>partitioning</span></a> <a href="https://ubuntu.social/tags/grub2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>grub2</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://ubuntu.social/tags/bios" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>bios</span></a></p><p><a href="https://askubuntu.com/q/1549908/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549908/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>GRUB menu not showing up on boot Ubuntu 24.10 <a href="https://ubuntu.social/tags/boot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>boot</span></a> <a href="https://ubuntu.social/tags/dualboot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dualboot</span></a> <a href="https://ubuntu.social/tags/grub2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>grub2</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a></p><p><a href="https://askubuntu.com/q/1549833/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549833/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>Converting autoinstall output to working/useful user-data #2204 <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://ubuntu.social/tags/autoinstall" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>autoinstall</span></a></p><p><a href="https://askubuntu.com/q/1549704/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549704/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>Selecting between USB and HD to boot Linux on Macbook <a href="https://ubuntu.social/tags/boot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>boot</span></a> <a href="https://ubuntu.social/tags/dualboot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dualboot</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://ubuntu.social/tags/mac" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mac</span></a></p><p><a href="https://askubuntu.com/q/1549629/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549629/612</span><span class="invisible"></span></a></p>
IT News<p>Bring Back The BIOS! (To UEFI Systems, That Is) - At the dawn of the PC, IBM provided the Basic Input Output System (BIOS). It took ... - <a href="https://hackaday.com/2025/05/29/bring-back-the-bios-to-uefi-systems-that-is/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2025/05/29/bring-</span><span class="invisible">back-the-bios-to-uefi-systems-that-is/</span></a> <a href="https://schleuss.online/tags/softwarehacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>softwarehacks</span></a> <a href="https://schleuss.online/tags/seabios" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seabios</span></a> <a href="https://schleuss.online/tags/bios" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>bios</span></a> <a href="https://schleuss.online/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a></p>
AskUbuntu<p>Booting from an UIbuntu Installation USB in UEFI mode yields an "Error /boot/ file not found" error message <a href="https://ubuntu.social/tags/boot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>boot</span></a> <a href="https://ubuntu.social/tags/usb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>usb</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a></p><p><a href="https://askubuntu.com/q/1549474/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549474/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>do-release-upgrade not working for ESP on /boot <a href="https://ubuntu.social/tags/partitioning" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>partitioning</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://ubuntu.social/tags/doreleaseupgrade" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>doreleaseupgrade</span></a> <a href="https://ubuntu.social/tags/debootstrap" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>debootstrap</span></a> #2504</p><p><a href="https://askubuntu.com/q/1549327/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549327/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>How to convert a dual-boot disk with MBR BIOS boot to GPT UEFI with secure boot enabled <a href="https://ubuntu.social/tags/dualboot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dualboot</span></a> <a href="https://ubuntu.social/tags/grub2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>grub2</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a> <a href="https://ubuntu.social/tags/gpt" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gpt</span></a> <a href="https://ubuntu.social/tags/gdisk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gdisk</span></a></p><p><a href="https://askubuntu.com/q/1549259/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1549259/612</span><span class="invisible"></span></a></p>
AskUbuntu<p>Why am I getting emergency mode? <a href="https://ubuntu.social/tags/boot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>boot</span></a> <a href="https://ubuntu.social/tags/grub2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>grub2</span></a> <a href="https://ubuntu.social/tags/uefi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uefi</span></a></p><p><a href="https://askubuntu.com/q/1548006/612" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/q/1548006/612</span><span class="invisible"></span></a></p>
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