CVE-2022-28736— There's a use-after-free vulnerability in grub_cmd_chainloader() function
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I. Basic Information for CVE-2022-28736
Vulnerability Information
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Vulnerability Title
There's a use-after-free vulnerability in grub_cmd_chainloader() function
Source: NVD (National Vulnerability Database)
Vulnerability 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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
grub2 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是美国GNU社区的一款Linux系统引导程序。 grub2 存在资源管理错误漏洞，该漏洞源于在grub_cmd_chainloader()中释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| GNU Project | GNU GRUB | 0 ~ 2.06-3 | - |
II. Public POCs for CVE-2022-28736
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · GNU Project · 2023-07-20 · 4 CVEs total
| CVE-2022-28734 | 8.1 HIGH | Out-of-bounds write when handling split HTTP headers |
| CVE-2022-28733 | 8.1 HIGH | Integer underflow in grub_net_recv_ip4_packets |
| CVE-2022-28735 | 6.7 MEDIUM | grub2 数据伪造问题漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2022-28736
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