CVE-2021-21341

HIGHScheduled

Published:Mar 23, 2021(5 years ago)

Modified:May 23, 2025

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability Description

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. 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.

Attack Characteristics

Network AccessLow ComplexityNo Auth NeededNo User Interaction

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
netapp	oncommand_insight	-	-
apache	activemq	5.15.14

Timeline

Published
CVE disclosed publicly
Mar 23, 20215 years ago
Last Modified
Most recent update
May 23, 202512 months ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://x-stream.github.io/changes.html#1.4.16Release Notes
https://github.com/x-stream/xstream/security/advisories/GHSA-2p3x-qw9c...Third Party Advisory
https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c7219...Issue Tracking

CVSS Score

v3.1

7.5/ 10.0

HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At a Glance

Affected Products

References

netapp / oncommand_insight

https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0...Issue Tracking

https://lists.debian.org/debian-lts-announce/2021/04/msg00002.htmlMailing List

https://lists.fedoraproject.org/archives/list/package-announce%40lists...Mailing List

https://security.netapp.com/advisory/ntap-20210430-0002/Third Party Advisory

https://www.debian.org/security/2021/dsa-5004Mailing List

https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory

https://www.oracle.com/security-alerts/cpujan2022.htmlPatch

https://www.oracle.com/security-alerts/cpuoct2021.htmlThird Party Advisory

https://x-stream.github.io/CVE-2021-21341.htmlExploit

https://x-stream.github.io/security.html#workaroundMitigation

http://x-stream.github.io/changes.html#1.4.16Release Notes

https://github.com/x-stream/xstream/security/advisories/GHSA-2p3x-qw9c...Third Party Advisory

https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c7219...Issue Tracking

https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0...Issue Tracking

https://lists.debian.org/debian-lts-announce/2021/04/msg00002.htmlMailing List

https://lists.fedoraproject.org/archives/list/package-announce%40lists...Mailing List

https://security.netapp.com/advisory/ntap-20210430-0002/Third Party Advisory

https://www.debian.org/security/2021/dsa-5004Mailing List

https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory

https://www.oracle.com/security-alerts/cpujan2022.htmlPatch

https://www.oracle.com/security-alerts/cpuoct2021.htmlThird Party Advisory

https://x-stream.github.io/CVE-2021-21341.htmlExploit

https://x-stream.github.io/security.html#workaroundMitigation

CVSS v3 Vector

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

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

ScopeUnchanged

ConfidentialityNone

IntegrityNone

AvailabilityHigh

Impact Analysis

ConfidentialityNone

NoneLowHigh

IntegrityNone

NoneLowHigh

AvailabilityHigh

NoneLowHigh

CVE-2021-21341

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description