Buffer overflow in Zohocorp Manageengine Assetexplorer
CVE-2021-20109
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Zohocorp Manageengine Assetexplorer — versions 1.0.34
- Manage Engine Asset Explorer Agent — versions 1.0.34
Weakness classification (CWE)
References
- www.tenable.com/security/research/tra-2021-30 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-20109?
- CVE-2021-20109 is a high-severity vulnerability in Zohocorp Manageengine Assetexplorer, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-07-19.
- How severe is CVE-2021-20109?
- High severity. CVSS v3 base score is 7.5 out of 10.