Alerts This Week
Warning Icon 1 924
Alerts This Week
Warning Icon 1 924

Red Hat 7.4: RHSA-2021-0702-01 Moderate: Grub2 Security Update

red hat
Calendar Grey March 2, 2021
Dist Redhat Esm H88
A security update for Grub2 in Red Hat Enterprise Linux 7.4 has been released, tackling several concerns with a moderate severity rating. Discover additional details!
An update for grub2 is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Li...

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.
Security Fix(es):
* grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled (CVE-2020-14372)
* grub2: Use-after-free in rmmod command (CVE-2020-25632)
* grub2: Out-of-bounds write in grub_usb_device_initialize() (CVE-2020-25647)
* grub2: Stack buffer overflow in grub_parser_split_cmdline() (CVE-2020-27749)
* grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled (CVE-2020-27779)
* grub2: Heap out-of-bounds write in short form option parser (CVE-2021-20225)
* grub2: Heap out-of-bounds write due to miscalculation of space required for quoting (CVE-2021-20233)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Topics%20covered

Topics Covered

security advisory moderate security update security issue Red Hat security patch grub2 boot loader

References

https://access.redhat.com/security/cve/CVE-2020-14372 https://access.redhat.com/security/cve/CVE-2020-25632 https://access.redhat.com/security/cve/CVE-2020-25647 https://access.redhat.com/security/cve/CVE-2020-27749 https://access.redhat.com/security/cve/CVE-2020-27779 https://access.redhat.com/security/cve/CVE-2021-20225 https://access.redhat.com/security/cve/CVE-2021-20233 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/vulnerabilities/RHSB-2021-003

Package List

Red Hat Enterprise Linux Server AUS (v. 7.4):
Source: grub2-2.02-0.86.el7_4.2.src.rpm
noarch: grub2-common-2.02-0.86.el7_4.2.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_4.2.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_4.2.noarch.rpm grub2-pc-modules-2.02-0.86.el7_4.2.noarch.rpm
x86_64: grub2-2.02-0.86.el7_4.2.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_4.2.x86_64.rpm grub2-efi-ia32-2.02-0.86.el7_4.2.x86_64.rpm grub2-efi-x64-2.02-0.86.el7_4.2.x86_64.rpm grub2-pc-2.02-0.86.el7_4.2.x86_64.rpm grub2-tools-2.02-0.86.el7_4.2.x86_64.rpm grub2-tools-extra-2.02-0.86.el7_4.2.x86_64.rpm grub2-tools-minimal-2.02-0.86.el7_4.2.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.4):
Source: grub2-2.02-0.86.el7_4.2.src.rpm
noarch: grub2-common-2.02-0.86.el7_4.2.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_4.2.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_4.2.noarch.rpm grub2-pc-modules-2.02-0.86.el7_4.2.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_4.2.noarch.rpm
ppc64le: grub2-2.02-0.86.el7_4.2.ppc64le.rpm grub2-debuginfo-2.02-0.86.el7_4.2.ppc64le.rpm grub2-ppc64le-2.02-0.86.el7_4.2.ppc64le.rpm grub2-tools-2.02-0.86.el7_4.2.ppc64le.rpm grub2-tools-extra-2.02-0.86.el7_4.2.ppc64le.rpm grub2-tools-minimal-2.02-0.86.el7_4.2.ppc64le.rpm
x86_64: grub2-2.02-0.86.el7_4.2.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:0702-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0702
Issue date: 2021-03-02

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 7.4Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.4 Update Services for SAPSolutions.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security update security issue Red Hat security patch grub2 boot loader

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - noarch, x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - noarch, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - noarch, x86_64

Red Hat Enterprise Linux Server TUS (v. 7.4) - noarch, x86_64

Bugs Fixed

1873150 - CVE-2020-14372 grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled

1879577 - CVE-2020-25632 grub2: Use-after-free in rmmod command

1886936 - CVE-2020-25647 grub2: Out-of-bounds write in grub_usb_device_initialize()

1899966 - CVE-2020-27749 grub2: Stack buffer overflow in grub_parser_split_cmdline()

1900698 - CVE-2020-27779 grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled

1924696 - CVE-2021-20225 grub2: Heap out-of-bounds write in short form option parser

1926263 - CVE-2021-20233 grub2: Heap out-of-bounds write due to miscalculation of space required for quoting

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here