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CVE-2019-17558

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Date: December 30, 2019

Apache Solr 5.0.0 to Apache Solr 8.3.1 are vulnerable to a Remote Code Execution through the VelocityResponseWriter. A Velocity template can be provided through Velocity templates in a configset "velocity/" directory or as a parameter. A user defined configset could contain renderable, potentially malicious, templates. Parameter provided templates are disabled by default, but can be enabled by setting "params.resource.loader.enabled" by defining a response writer with that setting set to "true". Defining a response writer requires configuration API access. Solr 8.4 removed the params resource loader entirely, and only enables the configset-provided template rendering when the configset is "trusted" (has been uploaded by an authenticated user).

Language: Java

Severity Score

Related Resources (62)

Severity Score

Weakness Type (CWE)

Improper Control of Generation of Code ('Code Injection')

CWE-94

Improper Input Validation

CWE-20

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CWE-74

Top Fix

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Upgrade Version

Upgrade to version org.apache.solr:solr-core:8.4.0;org.apache.solr:solr-core:8.4.0;org.apache.solr:solr-core:8.4.0;org.apache.solr:solr-core:8.4.0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): HIGH
Authentication (AU): SINGLE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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