CVE-2020-14260
About
HCL Domino is susceptible to a Buffer Overflow vulnerability in DXL due to improper validation of user input. A successful exploit could enable an attacker to crash Domino or execute attacker-controlled code on the server system.
Rainforest analyst review
A buffer overflow in HCL Domino's DXL processing, driven by improper validation of user input, can crash the server or run attacker-controlled code on it. The vector reads as remote and unauthenticated, so the worst case is code execution on a mail and collaboration server that typically holds a great deal of organizational data.
Domino is a high-value target simply because of what it stores and who it connects to, and memory-corruption RCE on that kind of platform is the sort of thing worth serious attention. The practical caveat is that exploitation depends on reaching the DXL-processing path, so the actual exposure hinges on how and where that surface is exposed rather than the raw 9.8.
Our work is asset inventory plus reachability: locating Domino instances, confirming which fall in the vulnerable range, and determining whether the DXL-handling functionality is reachable by an untrusted party or only internally. That reachability answer is what separates a critical from a manageable.
References
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Frequently asked questions
What is CVE-2020-14260?
HCL Domino is susceptible to a Buffer Overflow vulnerability in DXL due to improper validation of user input. A successful exploit could enable an attacker to crash Domino or execute attacker-controlled code on the server system.
How severe is CVE-2020-14260?
CVE-2020-14260 carries a CVSS 3.1 base score of 9.8, rated critical. 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 99 out of 100, in the critical band.
How is CVE-2020-14260 exploited?
According to the CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H): attack vector Network, attack complexity Low, privileges required None, user interaction None. Impact on confidentiality High, integrity High and availability High.
Which products are affected by CVE-2020-14260?
Public advisories list the following as affected: domino. Check the references on this page for the exact versions each vendor confirms.
How do I fix CVE-2020-14260?
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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