DescriptionApache Solr uses a PKI based mechanism to secure inter-node communication when security is enabled. It is possible to create a specially crafted node name that does not exist as part of the cluster and point it to a malicious node. This can trick the nodes in cluster to believe that the malicious node is a member of the cluster. So, if Solr users have enabled BasicAuth authentication mechanism using the BasicAuthPlugin or if the user has implemented a custom Authentication plugin, which does not implement either "HttpClientInterceptorPlugin" or "HttpClientBuilderPlugin", his/her servers are vulnerable to this attack. Users who only use SSL without basic authentication or those who use Kerberos are not affected.
SourceCVE (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 severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
lucene-solr (PTS)wheezy3.6.0+dfsg-1+deb7u1fixed
wheezy (security)3.6.0+dfsg-1+deb7u3fixed
jessie (security)3.6.2+dfsg-5+deb8u1fixed
stretch (security), stretch3.6.2+dfsg-10+deb9u1fixed
buster, sid3.6.2+dfsg-11fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
lucene-solrsource(unstable)(not affected)


- lucene-solr <not-affected> (Vulnerable code introduced later)

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