Integer overflow in grub - CVE-2020-15707

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Main Vulnerability Database Vulnerabilities #VU32925

Integer overflow in grub - CVE-2020-15707

Published: July 30, 2020


Vulnerability identifier: #VU32925
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-15707
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in the "grub_cmd_initrd" and "grub_initrd_init" functions in the "efilinux" component. An attacker with physical access can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

grub
Gentoo Linux
Debian Linux
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
CentOS
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for IBM z Systems
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Anolis OS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Ubuntu
Opensuse
openEuler
APM Edge
Data Computing Appliance (DCA)
fwupd (Red Hat package)
grub2 (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
shim-signed (Red Hat package)
shim (Red Hat package)
fwupd
grub-efi-arm64-signed (Ubuntu package)
grub-efi-amd64-signed (Ubuntu package)
grub-efi-amd64-bin (Ubuntu package)
grub-efi-ia32-bin (Ubuntu package)
grub-efi-arm-bin (Ubuntu package)
grub-efi-arm64-bin (Ubuntu package)
grub2 (Debian package)
grub2-efi-x64-cdboot
grub2-efi-ia32-cdboot
grub2-efi-ia32
grub2-tools
grub2-help
grub2-efi-aa64-modules
grub2-efi-aa64-cdboot
grub2-efi-aa64
grub2-efi-x64
grub2-debugsource
grub2-debuginfo
grub2-common
grub2
grub2-tools-efi
grub2-pc
fwupdate (Red Hat package)
shim-unsigned-x64 (Red Hat package)
IBM Security Guardium

How to mitigate CVE-2020-15707

Install updates from vendor's website.

grub - update to 2.05
APM Edge - update to 4.0
fwupd (Red Hat package) - addressed in versions 1.1.4-2.el8_1, 1.1.4-7.el8_2
grub2 (Red Hat package) - addressed in versions 2.02-0.86.el7_7, 2.02-0.86.el7_8, 2.02-87.el8_1, 2.02-87.el8_2
shim-signed (Red Hat package) - addressed in versions 15-7.el7_8, 15-8.el7_7
shim (Red Hat package) - addressed in versions 15-7.el7_9, 15-8.el7, 15-14.el8_1, 15-14.el8_2
fwupd - update to 1.1.4-7.0.1
grub-efi-arm64-signed (Ubuntu package) - addressed in versions 1.66.26+2.02~beta2-36ubuntu3.26, 1.66.27+2.02~beta2-36ubuntu3.27, 1.93.18+2.02-2ubuntu8.16, 1.93.19+2.02-2ubuntu8.17, 1.142.3+2.04-1ubuntu26.1, 1.142.4+2.04-1ubuntu26.2
grub-efi-amd64-signed (Ubuntu package) - addressed in versions 1.66.26+2.02~beta2-36ubuntu3.26, 1.66.27+2.02~beta2-36ubuntu3.27, 1.93.18+2.02-2ubuntu8.16, 1.93.19+2.02-2ubuntu8.17, 1.142.3+2.04-1ubuntu26.1, 1.142.4+2.04-1ubuntu26.2
grub-efi-amd64-bin (Ubuntu package) - addressed in versions 2.02~beta2-36ubuntu3.26, 2.02~beta2-36ubuntu3.27, 2.02-2ubuntu8.16, 2.02-2ubuntu8.17, 2.04-1ubuntu26.1, 2.04-1ubuntu26.2
grub-efi-ia32-bin (Ubuntu package) - addressed in versions 2.02~beta2-36ubuntu3.26, 2.02~beta2-36ubuntu3.27, 2.02-2ubuntu8.16, 2.02-2ubuntu8.17, 2.04-1ubuntu26.1, 2.04-1ubuntu26.2
grub-efi-arm-bin (Ubuntu package) - addressed in versions 2.02~beta2-36ubuntu3.26, 2.02~beta2-36ubuntu3.27, 2.02-2ubuntu8.16, 2.02-2ubuntu8.17, 2.04-1ubuntu26.1, 2.04-1ubuntu26.2
grub-efi-arm64-bin (Ubuntu package) - addressed in versions 2.02~beta2-36ubuntu3.26, 2.02~beta2-36ubuntu3.27, 2.02-2ubuntu8.16, 2.02-2ubuntu8.17, 2.04-1ubuntu26.1, 2.04-1ubuntu26.2
grub2 (Debian package) - update to 2.02+dfsg1-20+deb10u1
grub2-efi-x64-cdboot - update to 2.02-77
grub2-efi-ia32-cdboot - update to 2.02-77
grub2-efi-ia32 - update to 2.02-77
grub2-tools - update to 2.02-77
grub2-help - update to 2.02-77
grub2-efi-aa64-modules - update to 2.02-77
grub2-efi-aa64-cdboot - update to 2.02-77
grub2-efi-aa64 - update to 2.02-77
grub2-efi-x64 - update to 2.02-77
grub2-debugsource - update to 2.02-77
grub2-debuginfo - update to 2.02-77
grub2-common - update to 2.02-77
grub2 - update to 2.02-77
grub2-tools-efi - update to 2.02-77
grub2-pc - update to 2.02-77
Data Computing Appliance (DCA) - update to 4.3.0.0
fwupdate (Red Hat package) - addressed in versions 12-6.el7_7, 12-6.el7_8
shim-unsigned-x64 (Red Hat package) - update to 15-7.el8

External References

Related Security Bulletins