Details
-
Bug
-
Status: Resolved
-
Major
-
Resolution: Information Provided
-
1.3, 1.4, 1.4.1, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.6.1, 3.6.2, 4.0, 4.1, 4.2, 4.2.1, 4.3, 4.3.1, 4.4, 4.5, 4.5.1, 4.6, 4.6.1, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1, 4.9, 4.9.1, 4.10, 4.10.1, 4.10.2, 4.10.3, 4.10.4
-
None
-
None
Description
Severity: Medium
Vendor: The Apache Software Foundation
Versions Affected:
1.3.0 to 1.4.1
3.1.0 to 3.6.2
4.0.0 to 4.10.4
Description:
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.
Mitigation:
- Upgrade to Apache Solr 5.0 or later.
- Ensure your network settings are configured so that only trusted traffic is allowed to post documents to the running Solr instances.
Credit:
Matei "Mal" Badanoiu