CVE-2020-8432

Publication date 29 January 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In Das U-Boot through 2020.01, a double free has been found in the cmd/gpt.c do_rename_gpt_parts() function. Double freeing may result in a write-what-where condition, allowing an attacker to execute arbitrary code. NOTE: this vulnerablity was introduced when attempting to fix a memory leak identified by static analysis.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
u-boot	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Fixed 2021.01+dfsg-3ubuntu0~20.04.3
	19.10 eoan	Ignored end of life
	18.04 LTS bionic	Fixed 2020.10+dfsg-1ubuntu0~18.04.2
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

mdeslaur

per thread, introduced by: https://gitlab.denx.de/u-boot/u-boot/commit/18030d04

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
u-boot	Upstream: 5749faa

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H