Apache Solr Kerberos delegation token functionality flaws

Also known as GHSA-f553-j2gv-g5r9

Published 9 y ago 2017-09-18 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.5

v3.0 · NVD

CISA KEV

not known exploited

EPSS

2.2%

percentile 83%

Public exploits

none known

Apache Solr's Kerberos plugin can be configured to use delegation tokens, which allows an application to reuse the authentication of an end-user or another application. There are two issues with this functionality (when using SecurityAwareZkACLProvider type of ACL provider e.g. SaslZkACLProvider). Firstly, access to the security configuration can be leaked to users other than the solr super user. Secondly, malicious users can exploit this leaked configuration for privilege escalation to further expose/modify private data and/or disrupt operations in the Solr cluster. The vulnerability is fixed from Apache Solr 6.6.1 onwards.

Exploit prediction (EPSS)

2.19% probability of exploitation in the next 30 days, higher than 83% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	7.5	`CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	6.0	`AV:N/AC:M/Au:S/C:P/I:P/A:P`
GitHub	3.0	7.5	`CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected packages

Ecosystem	Package	Affected	Fixed in
maven	`org.apache.solr:solr-core`	>=6.2.0, <6.6.1	6.6.1

Affected products

Apache Software Foundation Apache Solr

Classification

Weakness

CWE-287 Improper Authentication

References

securityfocus.com /bid/100870 · vdb-entry, x_refsource_BID, x_transferred
mail-archives.us.apache.org /mod_mbox/www-announce/201709.mbox/%3CCAOOKt53AOScg04zUh0%2BR_fcXD0C9s5mQ-OzdgYdnHz49u1KmX · mailing-list, x_refsource_MLIST, x_transferred
nvd.nist.gov /vuln/detail/CVE-2017-9803 · advisory
issues.apache.org /jira/browse/SOLR-11184 · web
lists.apache.org /thread/f4rbt657n9x4kb74k1txhcojof5dzol5 · web

Sources

CVE List: CVE-2017-9803
GitHub Advisory: GHSA-f553-j2gv-g5r9
NVD: CVE-2017-9803

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary