Overview
- Description
- There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.
- Source
- security@ubuntu.com
- NVD status
- Modified
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
Weaknesses
- nvd@nist.gov
- CWE-416
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F969F462-AB12-4158-BBA9-A9D828434F9F",
"versionEndExcluding": "2.06-3",
"versionStartIncluding": "2.00"
}
],
"operator": "OR"
}
]
}
]