solr: Kerberos delegation token functionality allows to re-use authentication
Published Sep 18, 2017
8.1
HIGHCVSS 3.0
EPSS 2.19%
Description
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.
Affected products
-
- Version 6.2.0 to 6.6.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Solr | n/a |
|
No data.
Red Hat JBoss Data Grid 6
solr-core
Not affected
Red Hat JBoss Data Virtualization 6
solr-core
Not affected
Red Hat JBoss Enterprise Application Platform 6
solr-core
Not affected
Red Hat JBoss Fuse 6
camel
Not affected
Red Hat JBoss Fuse Service Works 6
solr-core
Not affected
Red Hat JBoss Portal 6
solr-core
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat JBoss Data Grid 6 | solr-core | Not affected | n/a |
| Red Hat JBoss Data Virtualization 6 | solr-core | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | solr-core | Not affected | n/a |
| Red Hat JBoss Fuse 6 | camel | Not affected | n/a |
| Red Hat JBoss Fuse Service Works 6 | solr-core | Not affected | n/a |
| Red Hat JBoss Portal 6 | solr-core | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of Apache Solr as shipped with in Red Hat products.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.19% (0.02194) | 81.81th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.20% (0.02202) | 80.14th | v5 (v2026.06.15) |
| Mar 13, 2026 | 1.55% (0.01546) | 81.19th | v4 (v2025.03.14) |
| Nov 21, 2025 | 0.34% (0.00342) | 56.22th | v4 (v2025.03.14) |
| Nov 18, 2025 | 1.55% (0.01546) | 79.83th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.36% (0.00360) | 55.27th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.39% (0.01386) | 68.25th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.36% (0.00360) | 56.05th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00059) | 27.00th | v3 (v2023.03.01) |
| Jun 6, 2024 | 0.06% (0.00059) | 24.90th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00059) | 22.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.85% (0.01855) | 47.92th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.85% (0.01855) | 0.00th | v1 |
References (9)
- http://mail-archives.us.apache.org/mod_mbox/www-announce/201709.mbox/%3CCAOOKt53AOScg04zUh0%2BR_fcXD0C9s5mQ-OzdgYdnHz49u1KmXw%40mail.gmail.com%3E mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/100870 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-9803 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1493507 Issue Tracking
- https://github.com/advisories/GHSA-f553-j2gv-g5r9 Advisory
- https://issues.apache.org/jira/browse/SOLR-11184
- https://lists.apache.org/thread/f4rbt657n9x4kb74k1txhcojof5dzol5
- https://nvd.nist.gov/vuln/detail/CVE-2017-9803
- https://www.cve.org/CVERecord?id=CVE-2017-9803
| Link | Providers | Tags |
|---|---|---|
| http://mail-archives.us.apache.org/mod_mbox/www-announce/201709.mbox/%3CCAOOKt53AOScg04zUh0%2BR_fcXD0C9s5mQ-OzdgYdnHz49u1KmXw%40mail.gmail.com%3E | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/100870 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2017-9803 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1493507 | Issue Tracking | |
| https://github.com/advisories/GHSA-f553-j2gv-g5r9 | Advisory | |
| https://issues.apache.org/jira/browse/SOLR-11184 | ||
| https://lists.apache.org/thread/f4rbt657n9x4kb74k1txhcojof5dzol5 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2017-9803 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-9803 |
Change history (0)
No recorded changes yet.