title: Out-of-bounds write when handling split HTTP headers
description: 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.
affected:
{
packageName: grub2
product: GNU GRUB
vendor: GNU Project
repo: https://git.savannah.gnu.org/cgit/grub.git
platforms: Linux
versions:
lessThan: 2.06-3, status: affected, version: 0, versionType: semver
}
metrics:
format: CVSS
cvssV3_1: [
version: 3.1
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
baseScore: 8.1
baseSeverity: HIGH
]