CVE-2019-20104

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The OpenID client application in Atlassian Crowd before version 3.6.2, and from version 3.7.0 before 3.7.1 allows remote attackers to perform a Denial of Service attack via an XML Entity Expansion vulnerability.

La aplicación de cliente OpenID en Atlassian Crowd antes de la versión 3.6.2 y desde la versión 3.7.0 anteriores a 3.7.1, permite a atacantes remotos llevar a cabo un ataque de Denegación de Servicio por medio de una vulnerabilidad de tipo XML Entity Expansion.

*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

2019-12-30 CVE Reserved
2020-02-06 CVE Published
2023-10-23 EPSS Updated
2024-09-16 CVE Updated
2024-09-16 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://zeroauth.ltd/blog/2020/02/07/cve-2019-20104-atlassian-crowd-openid-client-vulnerable-to-remote-dos-via-xml-entity-expansion	2024-09-16

URL	Date	SRC

URL	Date	SRC
https://jira.atlassian.com/browse/CWD-5526	2022-01-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				< 3.2.11 Search vendor "Atlassian" for product "Crowd" and version " < 3.2.11"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				>= 3.3.0 < 3.3.8 Search vendor "Atlassian" for product "Crowd" and version " >= 3.3.0 < 3.3.8"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				>= 3.4.0 < 3.4.7 Search vendor "Atlassian" for product "Crowd" and version " >= 3.4.0 < 3.4.7"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				>= 3.5.0 < 3.5.2 Search vendor "Atlassian" for product "Crowd" and version " >= 3.5.0 < 3.5.2"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				>= 3.6.0 < 3.6.2 Search vendor "Atlassian" for product "Crowd" and version " >= 3.6.0 < 3.6.2"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				>= 3.6.3 < 3.7.1 Search vendor "Atlassian" for product "Crowd" and version " >= 3.6.3 < 3.7.1"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				>= 3.7.2 < 4.0.0 Search vendor "Atlassian" for product "Crowd" and version " >= 3.7.2 < 4.0.0"		-		Affected