Zohocorp: >> Manageengine Assetexplorer Security Vulnerabilities
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.
CVSS Score
7.5
EPSS Score
0.032
Published
2021-07-19
Due to the Asset Explorer agent 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 AEAgent.cpp, the agent responding back over HTTP is vulnerable to a Heap Overflow if the POST payload response is too large. The POST payload response is converted to Unicode using vswprintf. This is written to a buffer only 0x2000 bytes big. If POST payload is larger, then heap overflow will occur.
CVSS Score
7.5
EPSS Score
0.028
Published
2021-07-19
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.
CVSS Score
9.8
EPSS Score
0.014
Published
2021-07-19
Zoho ManageEngine Asset Explorer 6.5 does not validate the System Center Configuration Manager (SCCM) database username when dynamically generating a command to schedule scans for SCCM. This allows an attacker to execute arbitrary commands on the AssetExplorer Server with NT AUTHORITY/SYSTEM privileges.
CVSS Score
7.2
EPSS Score
0.044
Published
2020-03-23
An issue was discovered in Zoho ManageEngine AssetExplorer 6.5. During an upgrade of the Windows agent, it does not validate the source and binary downloaded. This allows an attacker on an adjacent network to execute code with NT AUTHORITY/SYSTEM privileges on the agent machines by providing an arbitrary executable via a man-in-the-middle attack.
CVSS Score
6.4
EPSS Score
0.002
Published
2020-03-23
Server Side Request Forgery (SSRF) exists in Zoho ManageEngine AssetExplorer 6.2.0 and before for the ClientUtilServlet servlet via a URL in a parameter.
CVSS Score
8.8
EPSS Score
0.004
Published
2019-08-08
Server Side Request Forgery (SSRF) exists in Zoho ManageEngine AssetExplorer version 6.2.0 for the AJaxServlet servlet via a parameter in a URL.
CVSS Score
9.1
EPSS Score
0.036
Published
2019-08-08
Zoho ManageEngine AssetExplorer 6.2.0 is vulnerable to an XML External Entity Injection (XXE) attack when processing license XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources.
CVSS Score
8.5
EPSS Score
0.007
Published
2019-08-08
An issue was discovered in Zoho ManageEngine AssetExplorer. There is XSS via the SearchN.do search field.
CVSS Score
6.1
EPSS Score
0.019
Published
2019-07-11
An issue was discovered in Zoho ManageEngine AssetExplorer. There is XSS via the RCSettings.do rdsName parameter.
CVSS Score
6.1
EPSS Score
0.019
Published
2019-07-11