CVE-2021-47482— Linux kernel 安全漏洞
可能的 ATT&CK 技术 1AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 0c6b199f09be489c48622537a550787fc80aea73 | affected |
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20 | affected | ||
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< e50f957652190b5a88a8ebce7e5ab14ebd0d3f00 | affected | ||
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< fbf150b16a3635634b7dfb7f229d8fcd643c6c51 | affected | ||
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 6422e8471890273994fe8cc6d452b0dcd2c9483e | affected | ||
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< b0a2cd38553c77928ef1646ed1518486b1e70ae8 | affected | ||
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< a8f7359259dd5923adc6129284fdad12fc5db347 | affected | ||
c6c8fea29769d998d94fcec9b9f14d4b52b349d3< 6f68cd634856f8ca93bafd623ba5357e0f648c68 | affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2021-47482 基础信息
漏洞信息
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Vulnerability Title
net: batman-adv: fix error handling
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: batman-adv: fix error handling Syzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem was in wrong error handling in batadv_mesh_init(). Before this patch batadv_mesh_init() was calling batadv_mesh_free() in case of any batadv_*_init() calls failure. This approach may work well, when there is some kind of indicator, which can tell which parts of batadv are initialized; but there isn't any. All written above lead to cleaning up uninitialized fields. Even if we hide ODEBUG warning by initializing bat_priv->nc.work, syzbot was able to hit GPF in batadv_nc_purge_paths(), because hash pointer in still NULL. [1] To fix these bugs we can unwind batadv_*_init() calls one by one. It is good approach for 2 reasons: 1) It fixes bugs on error handling path 2) It improves the performance, since we won't call unneeded batadv_*_free() functions. So, this patch makes all batadv_*_init() clean up all allocated memory before returning with an error to no call correspoing batadv_*_free() and open-codes batadv_mesh_free() with proper order to avoid touching uninitialized fields.
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，该漏洞源于会清理未初始化的字段。
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-2021-47482 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2021-47482 其他参考 (8)
同批安全公告 · Linux · 2024-05-22 · 共 63 条
| CVE-2021-47496 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47478 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2021-47450 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47433 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47451 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47447 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47446 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47492 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47493 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47494 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47461 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47485 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47483 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47459 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47448 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47458 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47465 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47438 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2021-47473 | Linux kernel 安全漏洞 | |
| CVE-2021-47474 | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2021-47482
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