CVE-2017-1000410— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
n/a n/a
利用判断
利用概率较高，应尽快评估
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基金会发布的开源操作系统Linux所使用的内核。 Linux kernel 3.3-rc1及之后的版本中的L2CAP命令处理存在信息泄露漏洞。攻击者可利用该漏洞获取未初始化的栈变量，并控制未初始化栈变量中的数据，绕过KASLR和栈金丝雀保护。
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一、 漏洞 CVE-2017-1000410 基础信息
漏洞信息
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Vulnerability Title
N/A
来源: CVE Program / CVE List V5
Vulnerability Description
The Linux kernel version 3.3-rc1 and later is affected by a vulnerability lies in the processing of incoming L2CAP commands - ConfigRequest, and ConfigResponse messages. This info leak is a result of uninitialized stack variables that may be returned to an attacker in their uninitialized state. By manipulating the code flows that precede the handling of these configuration messages, an attacker can also gain some control over which data will be held in the uninitialized stack variables. This can allow him to bypass KASLR, and stack canaries protection - as both pointers and stack canaries may be leaked in this manner. Combining this vulnerability (for example) with the previously disclosed RCE vulnerability in L2CAP configuration parsing (CVE-2017-1000251) may allow an attacker to exploit the RCE against kernels which were built with the above mitigations. These are the specifics of this vulnerability: In the function l2cap_parse_conf_rsp and in the function l2cap_parse_conf_req the following variable is declared without initialization: struct l2cap_conf_efs efs; In addition, when parsing input configuration parameters in both of these functions, the switch case for handling EFS elements may skip the memcpy call that will write to the efs variable: ... case L2CAP_CONF_EFS: if (olen == sizeof(efs)) memcpy(&efs, (void *)val, olen); ... The olen in the above if is attacker controlled, and regardless of that if, in both of these functions the efs variable would eventually be added to the outgoing configuration request that is being built: l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs), (unsigned long) &efs); So by sending a configuration request, or response, that contains an L2CAP_CONF_EFS element, but with an element length that is not sizeof(efs) - the memcpy to the uninitialized efs variable can be avoided, and the uninitialized variable would be returned to the attacker (16 bytes).
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基金会发布的开源操作系统Linux所使用的内核。 Linux kernel 3.3-rc1及之后的版本中的L2CAP命令处理存在信息泄露漏洞。攻击者可利用该漏洞获取未初始化的栈变量，并控制未初始化栈变量中的数据，绕过KASLR和栈金丝雀保护。
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
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| - | n/a | n/a | - |
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二、漏洞 CVE-2017-1000410 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2017-1000410 厂商安全公告 (11)
CVE-2017-1000410 邮件列表归档 (1)
同批安全公告 · n/a · 2017-12-07 · 共 12 条
| CVE-2017-17435 | Vaultek Gun Safe VT20i 安全漏洞 | |
| CVE-2017-17436 | Vaultek Gun Safe VT20i 安全漏洞 | |
| CVE-2017-17448 | Linux kernel 安全漏洞 | |
| CVE-2017-17449 | Linux kernel 安全漏洞 | |
| CVE-2017-17450 | Linux kernel 安全漏洞 | |
| CVE-2017-17451 | WordPress WP Mailster插件跨站脚本漏洞 | |
| CVE-2017-17384 | ISPConfig 安全漏洞 | |
| CVE-2017-17430 | Sangoma NetBorder/Vega Session Controller 安全漏洞 | |
| CVE-2017-17458 | Mercurial 安全漏洞 | |
| CVE-2017-17459 | Fossil 安全漏洞 | |
| CVE-2017-14386 | Dell 2335dn和2355dn Multifunction Laser Printers 跨站脚本漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2017-1000410
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