CVE-2021-20110

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Due to Manage Engine Asset Explorer Agent 1.0.34 not validating HTTPS certificates, an attacker on the network can statically configure their IP address to match the Asset Explorer's Server IP address. This will allow an attacker to send a NEWSCAN request to a listening agent on the network as well as receive the agent's HTTP request verifying its authtoken. In httphandler.cpp, the agent reaching out over HTTP is vulnerable to an Integer Overflow, which can be turned into a Heap Overflow allowing for remote code execution as NT AUTHORITY/SYSTEM on the agent machine. The Integer Overflow occurs when receiving POST response from the Manage Engine server, and the agent calling "HttpQueryInfoW" in order to get the "Content-Length" size from the incoming POST request. This size is taken, but multiplied to a larger amount. If an attacker specifies a Content-Length size of 1073741823 or larger, this integer arithmetic will wrap the value back around to smaller integer, then calls "calloc" with this size to allocate memory. The following API "InternetReadFile" will copy the POST data into this buffer, which will be too small for the contents, and cause heap overflow.

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ZOHO ManageEngine AssetExplorer 信任管理问题漏洞

ZOHO ManageEngine AssetExplorer是美国卓豪（ZOHO）公司的一套资产管理软件。该软件提供资产跟踪、IT资产的扫描和资产所有权的跟踪等功能。 ZOHO ManageEngine AssetExplorer Agent 1.0.34存在信任管理问题漏洞，该漏洞允许攻击者向网络上的侦听代理发送一个NEWSCAN请求，并接收代理的HTTP请求来验证其身份验证。在httphandler.cpp中，通过HTTP连接的代理容易受到整数溢出的攻击，该整数溢出可以转化为堆溢出，允许在代理机器上

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