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High EPSS: 0.93976% (0.99887 Percentile) EPSS:

Server-Side Request Forgery in Apache Solr

Affected Packages Affected Versions Fixed Versions
maven:org.apache.solr:solr-parent < 8.8.2 8.8.2
0 Dependent packages
1 Dependent repositories

Affected Version Ranges

All affected versions

1.3.0, 1.4.0, 1.4.1, 3.1.0, 3.2.0, 3.3.0, 3.4.0, 3.5.0, 3.6.0, 3.6.1, 3.6.2, 4.0.0, 4.1.0, 4.2.0, 4.2.1, 4.3.0, 4.3.1, 4.4.0, 4.5.0, 4.5.1, 4.6.0, 4.6.1, 4.7.0, 4.7.1, 4.7.2, 4.8.0, 4.8.1, 4.9.0, 4.9.1, 4.10.0, 4.10.1, 4.10.2, 4.10.3, 4.10.4, 5.0.0, 5.1.0, 5.2.0, 5.2.1, 5.3.0, 5.3.1, 5.3.2, 5.4.0, 5.4.1, 5.5.0, 5.5.1, 5.5.2, 5.5.3, 5.5.4, 5.5.5, 6.0.0, 6.0.1, 6.1.0, 6.2.0, 6.2.1, 6.3.0, 6.4.0, 6.4.1, 6.4.2, 6.5.0, 6.5.1, 6.6.0, 6.6.1, 6.6.2, 6.6.3, 6.6.4, 6.6.5, 6.6.6, 7.0.0, 7.0.1, 7.1.0, 7.2.0, 7.2.1, 7.3.0, 7.3.1, 7.4.0, 7.5.0, 7.6.0, 7.7.0, 7.7.1, 7.7.2, 7.7.3, 8.0.0, 8.1.0, 8.1.1, 8.2.0, 8.3.0, 8.3.1, 8.4.0, 8.4.1, 8.5.0, 8.5.1, 8.5.2, 8.6.0, 8.6.1, 8.6.2, 8.6.3, 8.7.0, 8.8.0, 8.8.1

All unaffected versions

8.8.2, 8.9.0, 8.10.0, 8.10.1, 8.11.0, 8.11.1, 8.11.2, 8.11.3, 8.11.4

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.

References: