CVE-2021-43859

NameCVE-2021-43859
DescriptionXStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 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. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.
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-2924-1
NVD severitymedium

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+deb9u5fixed
buster, buster (security)1.4.11.1-1+deb10u3vulnerable
bullseye (security), bullseye1.4.15-3+deb11u1vulnerable
bookworm, sid1.4.18-2vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libxstream-javasourcestretch1.4.11.1-1+deb9u5DLA-2924-1
libxstream-javasource(unstable)(unfixed)

Notes

https://github.com/x-stream/xstream/security/advisories/GHSA-rmr5-cpv2-vgjf
https://x-stream.github.io/CVE-2021-43859.html
https://github.com/x-stream/xstream/commit/e8e88621ba1c85ac3b8620337dd672e0c0c3a846

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