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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.3418 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 Resolution: Patch/Upgrade Original Bulletin: https://issues.apache.org/jira/browse/SOLR-13750 - --------------------------BEGIN INCLUDED TEXT-------------------- 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 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. 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 References: [1] https://issues.apache.org/jira/browse/SOLR-13750 [2] https://wiki.apache.org/solr/SolrSecurity - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXXbplWaOgq3Tt24GAQhTcxAAl9/CrvP2GtsdAkayASiRjUw/KXj2Y5/h ClkUOJ9yrfAlgcaDNUwlkgdUHO6PkGNupZ2v4STZwmZFXpqo9ivanGLC8P+lFMrU 1iQa9qDM0e4OJiBP+Zx9L884L5DCVNmGppWg8FNM0PEZR3f5eNvVVbft5BnrgheF sps9srpU+vA+G2k5CnR8RHVNgdq9vVNbLGDFe+fxwno8g8qsWTbjj1UK/PQb/Smd XwsqgKVDyLbAEcy5SOoTuL06BPCrNvCOqhmrdW1QHwOlEpa6YodOy/5MiIA1+PZg 3jTDna2ZZ747MKnOr6oPG0q2oplhKAs1s4aa/Tg5dDpmaeeEGohdqDA08eY8bdvL bA2lZGCKlVDXqykQfyxUFdleY5eBNtmJhj3ls0gYT7z6HSxIxH1CCHbJmLkCJKzV 3s7Xd+hsxNH5X+uuIl88VCAPC+9TfuTpZ2xeDWw0YfP/rAKHhab5G10f3RE3gbI+ 3FlurE65WXJWZKuwvpPx6z756gPf4+kPMhp+F61yRg+qmnQ5l00FvIhfr5/bAv8n 4qfoV7xni2NpbtXRIu4SG+9+WRTsE3vq0q0dYW+eeuKMiVUitXrev5ZeMnjD8mFD 1r8HN1gUi9D7f2gP+a3FklydyOZcVYOEkmjxkQyQaAIVZedCRKgWiLN3LGvWSE6r HaWVtFDesFU= =w7Vp -----END PGP SIGNATURE-----