CVE-2021-43859

Denial of Service by injecting highly recursive collections or maps in XStream

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

XStream es una biblioteca java de código abierto para serializar objetos a XML y viceversa. Las versiones anteriores a 1.4.19, pueden permitir a un atacante remoto asignar el 100% del tiempo de la CPU en el sistema de destino, dependiendo del tipo de CPU o de la ejecución en paralelo de dicha carga útil, resultando en una denegación de servicio únicamente mediante la manipulación del flujo de entrada procesado. XStream versión 1.4.19 monitoriza y acumula el tiempo que tarda en añadir elementos a las colecciones y lanza una excepción si es superado un umbral establecido. Se recomienda a usuarios que actualicen lo antes posible. Los usuarios que no puedan actualizar pueden establecer el modo NO_REFERENCE para impedir una recursión. Ver GHSA-rmr5-cpv2-vgjf para más detalles sobre una medida de mitigación adicional si una actualización no es posible

This release of Red Hat Fuse 7.11.0 serves as a replacement for Red Hat Fuse 7.10 and includes bug fixes and enhancements, which are documented in the Release Notes document linked in the References. Issues addressed include HTTP request smuggling, bypass, code execution, denial of service, deserialization, information leakage, memory leak, privilege escalation, and traversal vulnerabilities.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2022-02-01 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (11)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2022/02/09/1	Mailing List
https://lists.debian.org/debian-lts-announce/2022/02/msg00018.html	Mailing List

URL	Date	SRC
https://github.com/x-stream/xstream/security/advisories/GHSA-rmr5-cpv2-vgjf	2024-08-04
https://x-stream.github.io/CVE-2021-43859.html	2024-08-04

URL	Date	SRC
https://github.com/x-stream/xstream/commit/e8e88621ba1c85ac3b8620337dd672e0c0c3a846	2023-11-07
https://www.oracle.com/security-alerts/cpuapr2022.html	2023-11-07
https://www.oracle.com/security-alerts/cpujul2022.html	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VACQYG356OHUTD5WQGAQ4L2TTFTAV3SJ	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XODFRE2ZL64FICBJDOPWOLPTSSAI4U7X	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-43859	2022-07-19
https://bugzilla.redhat.com/show_bug.cgi?id=2049783	2022-07-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Xstream Project Search vendor "Xstream Project"		Xstream Search vendor "Xstream Project" for product "Xstream"				< 1.4.19 Search vendor "Xstream Project" for product "Xstream" and version " < 1.4.19"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Oracle Search vendor "Oracle"		Commerce Guided Search Search vendor "Oracle" for product "Commerce Guided Search"				11.3.2 Search vendor "Oracle" for product "Commerce Guided Search" and version "11.3.2"		-		Affected
Oracle Search vendor "Oracle"		Communications Brm - Elastic Charging Engine Search vendor "Oracle" for product "Communications Brm - Elastic Charging Engine"				< 12.0.0.4.6 Search vendor "Oracle" for product "Communications Brm - Elastic Charging Engine" and version " < 12.0.0.4.6"		-		Affected
Oracle Search vendor "Oracle"		Communications Brm - Elastic Charging Engine Search vendor "Oracle" for product "Communications Brm - Elastic Charging Engine"				12.0.0.5.0 Search vendor "Oracle" for product "Communications Brm - Elastic Charging Engine" and version "12.0.0.5.0"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Automated Test Suite Search vendor "Oracle" for product "Communications Cloud Native Core Automated Test Suite"				1.9.0 Search vendor "Oracle" for product "Communications Cloud Native Core Automated Test Suite" and version "1.9.0"		-		Affected
Oracle Search vendor "Oracle"		Communications Diameter Intelligence Hub Search vendor "Oracle" for product "Communications Diameter Intelligence Hub"				>= 8.0.0 <= 8.1.0 Search vendor "Oracle" for product "Communications Diameter Intelligence Hub" and version " >= 8.0.0 <= 8.1.0"		-		Affected
Oracle Search vendor "Oracle"		Communications Diameter Intelligence Hub Search vendor "Oracle" for product "Communications Diameter Intelligence Hub"				>= 8.2.0 <= 8.2.6 Search vendor "Oracle" for product "Communications Diameter Intelligence Hub" and version " >= 8.2.0 <= 8.2.6"		-		Affected
Oracle Search vendor "Oracle"		Communications Policy Management Search vendor "Oracle" for product "Communications Policy Management"				12.6.0.0.0 Search vendor "Oracle" for product "Communications Policy Management" and version "12.6.0.0.0"		-		Affected
Oracle Search vendor "Oracle"		Flexcube Private Banking Search vendor "Oracle" for product "Flexcube Private Banking"				12.1.0 Search vendor "Oracle" for product "Flexcube Private Banking" and version "12.1.0"		-		Affected
Oracle Search vendor "Oracle"		Retail Xstore Point Of Service Search vendor "Oracle" for product "Retail Xstore Point Of Service"				16.0.6 Search vendor "Oracle" for product "Retail Xstore Point Of Service" and version "16.0.6"		-		Affected
Oracle Search vendor "Oracle"		Retail Xstore Point Of Service Search vendor "Oracle" for product "Retail Xstore Point Of Service"				17.0.4 Search vendor "Oracle" for product "Retail Xstore Point Of Service" and version "17.0.4"		-		Affected
Oracle Search vendor "Oracle"		Retail Xstore Point Of Service Search vendor "Oracle" for product "Retail Xstore Point Of Service"				18.0.3 Search vendor "Oracle" for product "Retail Xstore Point Of Service" and version "18.0.3"		-		Affected
Oracle Search vendor "Oracle"		Retail Xstore Point Of Service Search vendor "Oracle" for product "Retail Xstore Point Of Service"				19.0.2 Search vendor "Oracle" for product "Retail Xstore Point Of Service" and version "19.0.2"		-		Affected
Oracle Search vendor "Oracle"		Retail Xstore Point Of Service Search vendor "Oracle" for product "Retail Xstore Point Of Service"				20.0.1 Search vendor "Oracle" for product "Retail Xstore Point Of Service" and version "20.0.1"		-		Affected