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Sicherheitslücken in grub2-unsigned · Seite 3

In den letzten 30 Tagen veröffentlichte Sicherheitslücke für grub2-unsigned: 1. Davon im KEV-Katalog: 0.

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Sicherheitslücken: 44

  1. CVE-2021-3697

    Hoch · CVSS 7EPSS 0,46%Korrektur verfügbar

    CVE-2021-3697

    A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

    grub2-unsignedBetriebssysteme
    • Auf 2.06-2ubuntu14.1 aktualisieren
    Veröffentlicht Aktualisiert
    Originalmeldung 1 ↗Originalmeldung 2 ↗Originalmeldung 3 ↗

  2. CVE-2021-3696

    Mittel · CVSS 4.5EPSS 0,47%Korrektur verfügbar

    CVE-2021-3696

    A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

    grub2-unsignedBetriebssysteme
    • Auf 2.06-2ubuntu14.1 aktualisieren
    Veröffentlicht Aktualisiert
    Originalmeldung 1 ↗Originalmeldung 2 ↗Originalmeldung 3 ↗

  3. CVE-2021-3695

    Mittel · CVSS 4.5EPSS 0,46%Korrektur verfügbar

    CVE-2021-3695

    A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.

    grub2-unsignedBetriebssysteme
    • Auf 2.06-2ubuntu14.1 aktualisieren
    Veröffentlicht Aktualisiert
    Originalmeldung 1 ↗Originalmeldung 2 ↗Originalmeldung 3 ↗

  4. CVE-2021-3981

    Niedrig · CVSS 3.3EPSS 0,32%Korrektur verfügbar

    CVE-2021-3981

    A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong permission set allowing non privileged users to read its content. This represents a low severity confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg. This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no version with the fix is currently released.

    grub2-unsignedBetriebssysteme
    • Auf 2.06-2ubuntu14.1 aktualisieren
    Veröffentlicht Aktualisiert
    Originalmeldung 1 ↗Originalmeldung 2 ↗Originalmeldung 3 ↗

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