CVE-2021-21342

NameCVE-2021-21342
DescriptionXStream 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2616-1
NVD severitymedium
Debian Bugs985843

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libxstream-java (PTS)stretch1.4.9-2vulnerable
stretch (security)1.4.11.1-1+deb9u3fixed
buster, buster (security)1.4.11.1-1+deb10u2vulnerable
bullseye1.4.15-3fixed
sid1.4.15-4fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libxstream-javasourcestretch1.4.11.1-1+deb9u2DLA-2616-1
libxstream-javasource(unstable)1.4.15-2985843

Notes

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

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