The vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host 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.
See workarounds for the different versions covering all CVEs.
See full information about the nature of the vulnerability and the steps to reproduce it in XStream’s documentation for CVE-2021-21346.
wh1t3p1g G5-RD6@IIE found and reported the issue to XStream and provided the required information to reproduce it.
If you have any questions or comments about this advisory:
x-stream.github.io/changes.html#1.4.16
github.com/x-stream/xstream
github.com/x-stream/xstream/security/advisories/GHSA-4hrm-m67v-5cxr
lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E
lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E
lists.debian.org/debian-lts-announce/2021/04/msg00002.html
lists.fedoraproject.org/archives/list/[email protected]/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP
lists.fedoraproject.org/archives/list/[email protected]/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7
lists.fedoraproject.org/archives/list/[email protected]/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB
nvd.nist.gov/vuln/detail/CVE-2021-21346
security.netapp.com/advisory/ntap-20210430-0002
www.debian.org/security/2021/dsa-5004
www.oracle.com//security-alerts/cpujul2021.html
www.oracle.com/security-alerts/cpujan2022.html
www.oracle.com/security-alerts/cpuoct2021.html
x-stream.github.io/CVE-2021-21346.html
x-stream.github.io/security.html#workaround