Apache Solr up to 1.4.1/3.6.2/4.10.4 XML Document resource consumption

Summaryinfo

A vulnerability has been found in Apache Solr up to 1.4.1/3.6.2/4.10.4 and classified as problematic. This vulnerability affects unknown code of the component XML Document Handler. This manipulation causes resource consumption. The identification of this vulnerability is CVE-2019-12401. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Apache Solr up to 1.4.1/3.6.2/4.10.4 and classified as problematic. Affected by this vulnerability is an unknown part of the component XML Document Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

Solr versions 1.3.0 to 1.4.1, 3.1.0 to 3.6.2 and 4.0.0 to 4.10.4 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.

The weakness was shared 09/10/2019 (Website). The advisory is shared at mail-archives.us.apache.org. This vulnerability is known as CVE-2019-12401 since 05/28/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/18/2020). MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Apache

Name

• Solr

Version

• 1.4.0
• 1.4.1
• 3.6.0
• 3.6.1
• 3.6.2
• 4.10.0
• 4.10.1
• 4.10.2
• 4.10.3
• 4.10.4

License

• open-source

Website

• Vendor: https://www.apache.org/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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