Is CVE-2020-15707 in the CISA KEV catalog?

No. CVE-2020-15707 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-15707?

CVE-2020-15707 has a CVSS v3 base score of 5.7 (MEDIUM).

What is the EPSS score for CVE-2020-15707?

CVE-2020-15707 has an EPSS score of 1.59% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-15707?

Upgrade grub2 on debian 11 to 2.04-9 or later. Fixes are available for 9 affected products.

CVE & CISA-KEV Catalog

CVE-2020-15707

MEDIUMEPSS 73th pctl

5.7

CVSS v3

NVD

Description

Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.

CWE-362Race Condition CWE-190Integer Overflow

How to fix

Remediation Available

grub2Debian

Fixed in:2.04-9CVE-2020-15707

grub-efi-amd64-binUbuntu

Fixed in:2.02~beta2-9ubuntu1.20USN-4432-1

Fixed in:2.02~beta2-36ubuntu3.26USN-4432-1

Fixed in:2.02-2ubuntu8.16USN-4432-1

Fixed in:2.04-1ubuntu26.1USN-4432-1

grub-efi-amd64-signedUbuntu

Fixed in:1.34.22+2.02~beta2-9ubuntu1.20USN-4432-1

Fixed in:1.66.26+2.02~beta2-36ubuntu3.26USN-4432-1

Fixed in:1.93.18+2.02-2ubuntu8.16USN-4432-1

Fixed in:1.142.3+2.04-1ubuntu26.1USN-4432-1

grub-efi-arm-binUbuntu

Fixed in:2.02~beta2-9ubuntu1.20USN-4432-1

Fixed in:2.02~beta2-36ubuntu3.26USN-4432-1

Fixed in:2.02-2ubuntu8.16USN-4432-1

Fixed in:2.04-1ubuntu26.1USN-4432-1

grub-efi-arm64-binUbuntu

Fixed in:2.02~beta2-9ubuntu1.20USN-4432-1

Fixed in:2.02~beta2-36ubuntu3.26USN-4432-1

Fixed in:2.02-2ubuntu8.16USN-4432-1

Fixed in:2.04-1ubuntu26.1USN-4432-1

grub-efi-arm64-signedUbuntu

Fixed in:1.66.26+2.02~beta2-36ubuntu3.26USN-4432-1

Fixed in:1.93.18+2.02-2ubuntu8.16USN-4432-1

Fixed in:1.142.3+2.04-1ubuntu26.1USN-4432-1

grub-efi-ia32-binUbuntu

Fixed in:2.02~beta2-9ubuntu1.20USN-4432-1

Fixed in:2.02~beta2-36ubuntu3.26USN-4432-1

Fixed in:2.02-2ubuntu8.16USN-4432-1

Fixed in:2.04-1ubuntu26.1USN-4432-1

grub2Ubuntu

Fixed in:2.02~beta2-9ubuntu1.20USN-4432-1

Fixed in:2.02~beta2-36ubuntu3.26USN-4432-1

Fixed in:2.02-2ubuntu8.16USN-4432-1

Fixed in:2.04-1ubuntu26.1USN-4432-1

grub2-signedUbuntu

Fixed in:1.34.22USN-4432-1

Fixed in:1.66.26USN-4432-1

Fixed in:1.93.18USN-4432-1

Fixed in:1.142.3USN-4432-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

Exploit Intelligence

1.59%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Exploit1

eclypsium.com

Vendor Advisory1

lists.gnu.org

Third-Party Advisory14

Related Vulnerabilities

Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-6387	High	8.1	100%	-	Fix
CVE-2023-36884	High	7.5	99%	KEV + Ransom	Fix
CVE-2018-15473	Medium	5.3	99%	-	Fix
CVE-2024-27983	High	8.2	87%	-	Fix
CVE-2014-0226	Medium	6.8	86%	-	Fix
CVE-2016-5195	High	7.0	84%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.