CVE-2021-27905

Name	CVE-2021-27905
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	high

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
lucene-solr (PTS)	stretch	3.6.2+dfsg-10+deb9u2	vulnerable
	stretch (security)	3.6.2+dfsg-10+deb9u3	vulnerable
	buster	3.6.2+dfsg-20+deb10u2	vulnerable
	bullseye, sid	3.6.2+dfsg-24	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
lucene-solr	source	(unstable)	3.6.2+dfsg-23

Notes

[buster] - lucene-solr <ignored> (Minor issue)
[stretch] - lucene-solr <postponed> (Minor issue; can be fixed in next update)
https://lists.apache.org/thread.html/r0ddc3a82bd7523b1453cb7a5e09eb5559517145425074a42eb326b10%40%3Cannounce.apache.org%3E
Server components disabled in 3.6.2+dfsg-23, using that as the fixed version