CVE-2021-21343 Information

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 the deletion of a file on the local host. 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.

CVSS Vector

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

Reference

http://x-stream.github.io/changes.html#1.4.16 https://x-stream.github.io/security.html#workaround https://github.com/x-stream/xstream/security/advisories/GHSA-74cv-f58x-f9wf https://x-stream.github.io/CVE-2021-21343.html https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%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/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/ https://www.oracle.com/security-alerts/cpuoct2021.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/ https://www.debian.org/security/2021/dsa-5004 https://www.oracle.com/security-alerts/cpujan2022.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5