CVE-2021-43859

high

Description

XStream 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.

References

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

http://www.openwall.com/lists/oss-security/2022/02/09/1

https://lists.fedoraproject.org/archives/list/[email protected]/message/XODFRE2ZL64FICBJDOPWOLPTSSAI4U7X/

https://lists.fedoraproject.org/archives/list/[email protected]/message/VACQYG356OHUTD5WQGAQ4L2TTFTAV3SJ/

https://lists.debian.org/debian-lts-announce/2022/02/msg00018.html

https://www.oracle.com/security-alerts/cpuapr2022.html

https://www.oracle.com/security-alerts/cpujul2022.html

Details

Source: MITRE

Published: 2022-02-01

Updated: 2022-08-09

Type: CWE-400

Risk Information

CVSS v2

Base Score: 5

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

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

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

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH