CVE-2021-27905
ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has…
Technology
Apache Solr
CVSS Score
9.8 / 10.0
Affected Versions
<8.8.2
Upstream Fix
See upstream advisory
Published
April 13, 2021
OSSeva Coverage
Fixed upstream
Description
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.
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