CVE-2021-21342

critical

Description

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.

References

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

https://x-stream.github.io/CVE-2021-21342.html

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

https://github.com/x-stream/xstream/security/advisories/GHSA-hvv8-336g-rx3m

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

https://lists.apache.org/thread.html/[email protected]%3Cdev.jmeter.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cusers.activemq.apache.org%3E

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

https://www.oracle.com//security-alerts/cpujul2021.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/

https://lists.fedoraproject.org/archives/list/[email protected]/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/

https://www.oracle.com/security-alerts/cpuoct2021.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/

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

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

Details

Source: MITRE

Published: 2021-03-23

Updated: 2022-02-16

Type: CWE-918

Risk Information

CVSS v2

Base Score: 5.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N

Impact Score: 4.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 9.1

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

Impact Score: 5.2

Exploitability Score: 3.9

Severity: CRITICAL