CVE-2021-20108

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Manage Engine Asset Explorer Agent 1.0.34 listens on port 9000 for incoming commands over HTTPS from Manage Engine Server. The HTTPS certificates are not verified which allows any arbitrary user on the network to send commands over port 9000. While these commands may not be executed (due to authtoken validation), the Asset Explorer agent will reach out to the manage engine server for an HTTP request. During this process, AEAgent.cpp allocates 0x66 bytes using "malloc". This memory is never free-ed in the program, causing a memory leak. Additionally, the instruction sent to aeagent (ie: NEWSCAN, DELTASCAN, etc) is converted to a unicode string, but is never freed. These memory leaks allow a remote attacker to exploit a Denial of Service scenario through repetitively sending these commands to an agent and eventually crashing it the agent due to an out-of-memory condition.

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ZOHO ManageEngine AssetExplorer 安全漏洞

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版本存在安全漏洞，该漏洞源于程序在9000端口上监听来自Manage Engine Server的HTTPS传入命令时HTTPS证书不被验证，这允许网络上的任意用户通过9000端口发送命令。

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