Auth bypass in Apache Solr
CVE-2021-29943
When using ConfigurableInternodeAuthHadoopPlugin for authentication, Apache Solr versions prior to 8.8.2 would forward/proxy distributed requests using server credentials instead of original client credentials. This would result in incorrect authorization resolution on the receiving hosts.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.047 (91.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.047 · newest: 0.047 · change: 0.000
Affected products
- Apache Solr
- Apache Software Foundation Solr — versions Apache Solr
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread.html/r91dd0ff556e0c9aab4c92852e0e540c59d4633718ce128815… (Mailing List, Vendor Advisory)
- security.netapp.com/advisory/ntap-20210604-0009/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29943?
- CVE-2021-29943 is a critical-severity vulnerability in Apache Solr, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2021-04-13.
- How severe is CVE-2021-29943?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-29943 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.