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AUSCERT External Security Bulletin Redistribution
A vulnerability has been identified in Apache Solr
10 September 2019
AusCERT Security Bulletin Summary
Product: Apache Solr
Publisher: The Apache Software Foundation
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
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Vendor: The Apache Software Foundation
1.3.0 to 1.4.1
3.1.0 to 3.6.2
4.0.0 to 4.10.4
Solr versions prior to 5.0.0 are vulnerable to an XML resource consumption
attack (a.k.a. Lol Bomb) via its 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.
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.
Matei "Mal" Badanoiu
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