CVE-2022-28734

Publication date 20 July 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

Out-of-bounds write when handling split HTTP headers; When handling split HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point by one position. This can lead to a out-of-bound write further when parsing the HTTP request, writing a NULL byte past the buffer. It's conceivable that an attacker controlled set of packets can lead to corruption of the GRUB2's internal memory metadata.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
grub2	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
grub2-signed	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Ignored end of life
	22.04 LTS jammy	Fixed 1.187.3~22.04.1
	20.04 LTS focal	Fixed 1.187.3~20.04.1
	18.04 LTS bionic	Fixed 1.187.3~18.04.1
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Needs evaluation
grub2-unsigned	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Ignored end of life
	22.04 LTS jammy	Fixed 2.06-2ubuntu14.1
	20.04 LTS focal	Fixed 2.06-2ubuntu14.1
	18.04 LTS bionic	Fixed 2.06-2ubuntu14.1
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Not in release

Severity score breakdown

Parameter	Value
Base score	8.1 · High
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)