Apache Solr vulnerable to XML Bomb
Date: 2022-05
Affected: maven/org.apache.solr:solr-core
Attack vector: other
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2019-12401
CWE: CWE-776
CVSS: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Solr versions prior to 5.0.0 are vulnerable to an XML resource consumption attack (a.k.a. Lol Bomb) via it?s update handler.?By leveraging XML DOCTYPE and ENTITY type elements, the attacker can create a pattern that will expand when the server parses the XML causing OOMs.


Mitigations:

Architectural layers (MAESTRO):