Amcrest IPM-721S内存破坏漏洞

CVE编号

CVE-2017-13719

利用情况

暂无

补丁情况

N/A

披露时间

2019-07-04

漏洞描述

The Amcrest IPM-721S Amcrest_IPC-AWXX_Eng_N_V2.420.AC00.17.R.20170322 allows HTTP requests that permit enabling various functionalities of the camera by using HTTP APIs, instead of the web management interface that is provided by the application. This HTTP API receives the credentials as base64 encoded in the Authorization HTTP header. However, a missing length check in the code allows an attacker to send a string of 1024 characters in the password field, and allows an attacker to exploit a memory corruption issue. This can allow an attacker to circumvent the account protection mechanism and brute force the credentials. If the firmware version Amcrest_IPC-AWXX_Eng_N_V2.420.AC00.17.R.20170322 is dissected using the binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that has many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that performs the credential check in the binary for the HTTP API specification. If we open this binary in IDA Pro we will notice that this follows an ARM little-endian format. The function at address 00415364 in IDA Pro starts the HTTP authentication process. This function calls another function at sub_ 0042CCA0 at address 0041549C. This function performs a strchr operation after base64 decoding the credentials, and stores the result on the stack, which results in a stack-based buffer overflow.

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/153224/Amcrest-IPM-721S-Credential-Discl...
https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Amcrest_sec_issues.pdf
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	amcrest	ipm-721s_firmware	amcrest_ipc-awxx_eng_n_v2.420.ac00.17.r.20170322	-
	运行在以下环境
	硬件	amcrest	ipm-721s	-	-

CVSS3评分 9.8

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 无
• 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:N/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