cve/2021/CVE-2021-43859.md

CVE-2021-43859

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.

POC

Reference

• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://www.oracle.com/security-alerts/cpujul2022.html

Github

• https://github.com/20142995/nuclei-templates
• https://github.com/ARPSyndicate/cvemon
• https://github.com/cyb3r-w0lf/nuclei-template-collection
• https://github.com/muneebaashiq/MBProjects
• https://github.com/r00t4dm/r00t4dm
• https://github.com/rootameen/vulpine