Paper/Archive/CVE-2021-27905

CVE-2021-27905

Apache Software Foundation Apache Solr — SSRF vulnerability with the Replication handler

CVSS 9.8 (NVD)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 99.8.998 × 2020.0 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Apache SolrApache Solr – < 8.8.28.8.2CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References