Name: CVE-2021-27905: Server-Side Request Forgery (SSRF)
Creator: Rapid7
Published: 2021-04-13T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-27905, CWE-918, CVSS 9.8, EPSS 0.93901

The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl" (also "leaderUrl" alias) parameter that is used to designate another ReplicationHandler on another Solr core to replicate index data into the local core. To prevent a SSRF vulnerability, Solr ought to check these parameters against a similar configuration it uses for the "shards" parameter. Prior to this bug getting fixed, it did not. This problem affects essentially all Solr versions prior to it getting fixed in 8.8.2.

CVSS Details

CVSS 3.1 Base Score: 9.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Apache Solr	—	Upgrade Apache Solr to the latest version	Nov 27, 2023	Apr 13, 2021
Debian	—	Upgrade lucene-solr	Jul 30, 2024	Apr 13, 2021

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CVSS Details

Covered by Rapid7

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