Is CVE-2021-21348 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 14%.

What products does CVE-2021-21348 affect?

Tracked products affected include ActiveMQ. Check the version you run to see whether it is affected.

How do I fix CVE-2021-21348?

Apply the vendor fix in your normal patch cycle. Upgrade affected products to a fixed version.

CVE-2021-21348

Q: What is CVE-2021-21348?

CVE-2021-21348 is a medium-severity software vulnerability (Uncontrolled resource consumption) with a CVSS score of 5.3. XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to occupy a thread that consumes maximum CPU time and will never return. No u

MEDIUM severity · CVSS 5.3 · Uncontrolled resource consumption

5.3CVSS MEDIUM

Summary

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to occupy a thread that consumes maximum CPU time and will never return. 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.

Impact & exploitability

Attack vectorNetwork

Attack complexityHigh

Privileges requiredNone

User interactionRequired

Confidentiality impactNone

Integrity impactNone

Availability impactHigh

Exploit probability (EPSS)14%

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

Affected products we track (1)

ActiveMQ

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

CVE-2021-21348

Summary

Impact & exploitability

Affected products we track (1)

Recommendation

Additional information