CVE-2020-7832
About
A vulnerability (improper input validation) in the DEXT5 Upload solution allows an unauthenticated attacker to download and execute an arbitrary file via AddUploadFile, SetSelectItem, DoOpenFile function.(CVE-2020-7832)
Rainforest analyst review
Through improper input validation in the DEXT5 Upload solution, an unauthenticated attacker can cause an arbitrary file to be downloaded and executed via specific upload functions, but the vector requires user interaction, so a victim has to trigger the path. The end result is code running on that victim's machine.
Because it hinges on user interaction, this is effectively a client-side, phishing-deliverable bug: get the right person to take the action and arbitrary code executes. That makes it weaponizable in targeted lures even though it isn't a hands-off remote exploit.
Our angle here is detection and scoping. We note the interaction requirement plainly when prioritizing, inventory where DEXT5 Upload is actually in use, and lean on detecting the malicious download-and-execute pattern, since the human-in-the-loop step is both the gate and the thing hardest to patch away.
References
Related CVEs
Frequently asked questions
What is CVE-2020-7832?
A vulnerability (improper input validation) in the DEXT5 Upload solution allows an unauthenticated attacker to download and execute an arbitrary file via AddUploadFile, SetSelectItem, DoOpenFile function.(CVE-2020-7832)
How severe is CVE-2020-7832?
CVE-2020-7832 carries a CVSS 3.1 base score of 8.8, rated high. On the Rainforest Risk Index — which weighs the severity alongside how easy the flaw is to reach and how broad its impact is — it scores 88 out of 100, in the critical band.
How is CVE-2020-7832 exploited?
According to the CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H): attack vector Network, attack complexity Low, privileges required None, user interaction Required. Impact on confidentiality High, integrity High and availability High.
Which products are affected by CVE-2020-7832?
Public advisories list the following as affected: dext5, windows. Check the references on this page for the exact versions each vendor confirms.
How do I fix CVE-2020-7832?
Apply the fix the vendor published — the references on this page link to the primary advisories and patches. When patching can't happen right away, reduce the exposure of the affected component and watch it for exploitation attempts. Rainforest customers see this vulnerability correlated to their own assets and prioritized by real exposure, not by score alone.
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