Linux Security
Linux Security
Linux Security

Debian: DSA-4867-1: grub2 security update

Date 02 Mar 2021
219
Posted By LinuxSecurity Advisories
Several vulnerabilities have been discovered in the GRUB2 bootloader. CVE-2020-14372

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4867-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                     Salvatore Bonaccorso
March 02, 2021                        https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : grub2
CVE ID         : CVE-2020-14372 CVE-2020-25632 CVE-2020-25647 CVE-2020-27749
                 CVE-2020-27779 CVE-2021-20225 CVE-2021-20233

Several vulnerabilities have been discovered in the GRUB2 bootloader.

CVE-2020-14372

    It was discovered that the acpi command allows a privileged user to
    load crafted ACPI tables when Secure Boot is enabled.

CVE-2020-25632

    A use-after-free vulnerability was found in the rmmod command.

CVE-2020-25647

    An out-of-bound write vulnerability was found in the
    grub_usb_device_initialize() function, which is called to handle USB
    device initialization.

CVE-2020-27749

    A stack buffer overflow flaw was found in grub_parser_split_cmdline.

CVE-2020-27779

    It was discovered that the cutmem command allows a privileged user
    to remove memory regions when Secure Boot is enabled.

CVE-2021-20225

    A heap out-of-bounds write vulnerability was found in the short form
    option parser.

CVE-2021-20233

    A heap out-of-bound write flaw was found caused by mis-calculation
    of space required for quoting in the menu rendering.

Further detailed information can be found at
https://www.debian.org/security/2021-GRUB-UEFI-SecureBoot

For the stable distribution (buster), these problems have been fixed in
version 2.02+dfsg1-20+deb10u4.

We recommend that you upgrade your grub2 packages.

For the detailed security status of grub2 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/grub2

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.

Advisories

LinuxSecurity Poll

How frequently do you patch/update your system?

No answer selected. Please try again.
Please select either existing option or enter your own, however not both.
Please select minimum 0 answer(s) and maximum 3 answer(s).
/main-polls/52-how-frequently-do-you-patch-update-your-system?task=poll.vote&format=json
52
radio
[{"id":"179","title":"As soon as patches\/updates are released - I track advisories for my distro(s) diligently","votes":"42","type":"x","order":"1","pct":84,"resources":[]},{"id":"180","title":"Every so often, when I think of it","votes":"4","type":"x","order":"2","pct":8,"resources":[]},{"id":"181","title":"Hardly ever","votes":"4","type":"x","order":"3","pct":8,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350

Please vote first in order to view vote results.

VOTE ON THE POLL PAGE


VIEW MORE POLLS

bottom 200

Please enable / Bitte aktiviere JavaScript!
Veuillez activer / Por favor activa el Javascript![ ? ]

We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.