CVE-2021-3695
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I. Basic Information for CVE-2021-3695
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
grub2 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是GNU社区的一款Linux系统引导程序。 grub2 存在缓冲区错误漏洞，攻击者通过精心制作的PNG灰度图像利用该漏洞导致堆中越界写入。
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 |
|---|---|---|---|---|
| - | grub2 | grub-2.06 | - |
II. Public POCs for CVE-2021-3695
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://security.netapp.com/advisory/ntap-20220930-0001/x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-3695
Same Patch Batch · n/a · 2022-07-06 · 30 CVEs total
| CVE-2022-24141 | iTop VPN 安全漏洞 | |
| CVE-2022-2318 | Linux kernel 资源管理错误漏洞 | |
| CVE-2022-32290 | Northern.tech Mender 安全漏洞 | |
| CVE-2022-30591 | quic-go 资源管理错误漏洞 | |
| CVE-2022-32386 | Tenda AC23 缓冲区错误漏洞 | |
| CVE-2022-32385 | Tenda AC23 缓冲区错误漏洞 | |
| CVE-2022-32383 | Tenda AC23 缓冲区错误漏洞 | |
| CVE-2021-31676 | PESCMS 跨站脚本漏洞 | |
| CVE-2021-31677 | PESCMS 跨站请求伪造漏洞 | |
| CVE-2021-31679 | PESCMS 跨站请求伪造漏洞 | |
| CVE-2021-31678 | PESCMS 跨站请求伪造漏洞 | |
| CVE-2022-28935 | 多款TOTOLINK产品命令注入漏洞 | |
| CVE-2022-24138 | IOBit Advanced System Care (Asc.exe) 15、Action Download Center 安全漏洞 | |
| CVE-2022-24139 | IOBit Advanced System Care Free 安全漏洞 | |
| CVE-2022-24140 | 多款IOBit产品安全漏洞 | |
| CVE-2021-4234 | OpenVPN 安全漏洞 | |
| CVE-2022-30929 | Mini-Tmall 安全漏洞 | |
| CVE-2021-3696 | grub2 缓冲区错误漏洞 | |
| CVE-2021-3697 | grub2 缓冲区错误漏洞 | |
| CVE-2022-33737 | OpenVPN 日志信息泄露漏洞 |
Showing top 20 of 30 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Grub2: missing unregister call for normal commands may lead - CVE-2025-61662
Grub2: missing unregister call for gettext command may lead - CVE-2025-61661
Grub2: grub2: out-of-bounds write via malicious usb device
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