Securifi Almond 缓冲区错误漏洞

CVE编号

CVE-2017-8336

利用情况

暂无

补丁情况

N/A

披露时间

2019-06-19

漏洞描述

An issue was discovered on Securifi Almond, Almond+, and Almond 2015 devices with firmware AL-R096. The device provides a user with the capability of adding new routes to the device. It seems that the POST parameters passed in this request to set up routes on the device can be set in such a way that would result in overflowing the stack set up and allow an attacker to control the $ra register stored on the stack. If the firmware version AL-R096 is dissected using binwalk tool, we obtain a cpio-root archive which contains the filesystem set up on the device that contains all the binaries. The binary "goahead" is the one that has the vulnerable function that recieves the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows a MIPS little endian format. The function sub_00420F38 in IDA pro is identified to be receiving the values sent in the POST request. The POST parameter "gateway" allows to overflow the stack and control the $ra register after 1546 characters. The value from this post parameter is then copied on the stack at address 0x00421348 as shown below. This allows an attacker to provide the payload of his/her choice and finally take control of the device.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
http://packetstormsecurity.com/files/153227/Securifi-Almond-2015-Buffer-Overf...
https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Securifi_Almond...
https://seclists.org/bugtraq/2019/Jun/8

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	系统	securifi	almond+firmware	al-r096	-
	运行在以下环境
	系统	securifi	almond_2015_firmware	al-r096	-
	运行在以下环境
	系统	securifi	almond_firmware	al-r096	-
	运行在以下环境
	硬件	securifi	almond	-	-
	运行在以下环境
	硬件	securifi	almond+	-	-
	运行在以下环境
	硬件	securifi	almond_2015	-	-

CVSS3评分 8.8

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 低
• 影响范围 未更改
• 用户交互 无
• 可用性 高
• 保密性 高
• 完整性 高

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CWE-ID 漏洞类型 CWE-119 内存缓冲区边界内操作的限制不恰当