7.5

CVE-2019-20104

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Atlassian ≫ Crowd Version < 3.2.11
Atlassian ≫ Crowd Version >= 3.3.0 < 3.3.8
Atlassian ≫ Crowd Version >= 3.4.0 < 3.4.7
Atlassian ≫ Crowd Version >= 3.5.0 < 3.5.2
Atlassian ≫ Crowd Version >= 3.6.0 < 3.6.2
Atlassian ≫ Crowd Version >= 3.6.3 < 3.7.1
Atlassian ≫ Crowd Version >= 3.7.2 < 4.0.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 2.43% 0.821
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 5 10 2.9
AV:N/AC:L/Au:N/C:N/I:N/A:P
CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

https://jira.atlassian.com/browse/CWD-5526
Vendor Advisory
https://zeroauth.ltd/blog/2020/02/07/cve-2019-20104-atlassian-crowd-openid-client-vulnerable-to-remote-dos-via-xml-entity-expansion/
Exploit
Technical Description