CVE-2021-21342

Oncommand Insight vulnerability

CVSS

5.3

EPSS

50.0%

EPSS pct

99th

Exploited

No known

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in a server-side forgery request. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

Affected vendor

Netapp

Affected product

Oncommand Insight

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Weakness type (CWE)

CWE-502 — Deserialization of Untrusted Data
CWE-918 — Server-Side Request Forgery (SSRF)

Published

2021-03-23

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 50.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2021-21342

Confirm whether Netapp Oncommand Insight is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-21342.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-21342

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