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
Link Providers
https://lists.apache.org/thread.html/r0ddc3a82bd7523b1453cb7a5e09eb5559517145425074a42eb326b10%40%3Cannounce.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r140128dc6bb4f4e0b6a39e962c7ca25a8cbc8e48ed766176c931fccc%40%3Cusers.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3da74965aba2b5f5744b7289ad447306eeb2940c872801819faa9314%40%3Cusers.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r6ccec7fc54d82591b23c143f1f6a6e38f6e03e75db70870e4cb14a1a%40%3Ccommits.ofbiz.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r720a4a0497fc90bad5feec8aa18b777912ee15c7eeb5f882adbf523e%40%3Ccommits.ofbiz.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r78a3a4f1138a1608b0c6d4a2ee7647848c1a20b0d5c652cd9b02c25a%40%3Ccommits.ofbiz.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r8f1152a43c36d878bbeb5a92f261e9efaf3af313b033d7acfccea59d%40%3Cnotifications.ofbiz.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r95df34bb158375948da82b4dfe9a1b5d528572d586584162f8f5aeef%40%3Cusers.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rae9ccaecce9859f709ed1458545d90a4c07163070dc98b5e9e59057f%40%3Cnotifications.ofbiz.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rd232d77c57a8ce172359ab098df9512d8b37373ab87c444be911b430%40%3Cnotifications.ofbiz.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/re9d64bb8e5dfefddcbf255adb4559e13a0df5b818da1b9b51329723f%40%3Cnotifications.ofbiz.apache.org%3E cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-27905 cve-icon
https://security.netapp.com/advisory/ntap-20210611-0009/ cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-27905 cve-icon
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2021-04-13T06:35:20

Updated: 2024-08-03T21:33:16.792Z

Reserved: 2021-03-02T00:00:00

Link: CVE-2021-27905

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-04-13T07:15:12.137

Modified: 2023-11-07T03:32:02.153

Link: CVE-2021-27905

cve-icon Redhat

Severity : Important

Publid Date: 2021-04-12T00:00:00Z

Links: CVE-2021-27905 - Bugzilla