CVE-2021-47288— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ngene_command_config_free_buf函数中存在越界错误。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | dae52d009fc950b5c209260d50fcc000f5becd3c< 4487b968e5eacd02c493303dc2b61150bb7fe4b2 |
affected |
dae52d009fc950b5c209260d50fcc000f5becd3c< c6ddeb63dd543b5474b0217c4e47538b7ffd7686 |
affected | ||
dae52d009fc950b5c209260d50fcc000f5becd3c< e818f2ff648581a6c553ae2bebc5dcef9a8bb90c |
affected | ||
dae52d009fc950b5c209260d50fcc000f5becd3c< ec731c6ef564ee6fc101fc5d73e3a3a953d09a00 |
affected | ||
dae52d009fc950b5c209260d50fcc000f5becd3c< e617fa62f6cf859a7b042cdd6c73af905ff8fca3 |
affected | ||
dae52d009fc950b5c209260d50fcc000f5becd3c< e991457afdcb5f4dbc5bc9d79eaf775be33e7092 |
affected | ||
dae52d009fc950b5c209260d50fcc000f5becd3c< b9a178f189bb6d75293573e181928735f5e3e070 |
affected | ||
dae52d009fc950b5c209260d50fcc000f5becd3c< 8d4abca95ecc82fc8c41912fa0085281f19cc29f |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2021-47288 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()
Fix an 11-year old bug in ngene_command_config_free_buf() while
addressing the following warnings caught with -Warray-bounds:
arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]
arch/x86/include/asm/string_32.h:182:25: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]
The problem is that the original code is trying to copy 6 bytes of
data into a one-byte size member _config_ of the wrong structue
FW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a
legitimate compiler warning because memcpy() overruns the length
of &com.cmd.ConfigureBuffers.config. It seems that the right
structure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains
6 more members apart from the header _hdr_. Also, the name of
the function ngene_command_config_free_buf() suggests that the actual
intention is to ConfigureFreeBuffers, instead of ConfigureBuffers
(which takes place in the function ngene_command_config_buf(), above).
Fix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS
into new struct config, and use &com.cmd.ConfigureFreeBuffers.config as
the destination address, instead of &com.cmd.ConfigureBuffers.config,
when calling memcpy().
This also helps with the ongoing efforts to globally enable
-Warray-bounds and get us closer to being able to tighten the
FORTIFY_SOURCE routines on memcpy().
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ngene_command_config_free_buf函数中存在越界错误。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2021-47288 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2021-47288 其他参考 (8)
同批安全公告 · Linux · 2024-05-21 · 共 361 条
| CVE-2023-52741 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47378 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52755 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52732 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47328 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47232 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2023-52846 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52769 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52790 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47308 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47390 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52801 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52776 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52798 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47388 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52829 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47240 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47352 | 8.4 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47244 | 8.2 HIGH | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2021-47288
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