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CVE-2021-29262— Misapplied Zookeeper ACLs can result in leakage of configured authentication and authorization settings

Quick assessment

Affected
Apache Software Foundation Apache Solr
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Solr是美国阿帕奇（Apache）基金会的一款基于Lucene（一款全文搜索引擎）的搜索服务器。该产品支持层面搜索、垂直搜索、高亮显示搜索结果等。 Apache Solr 8.8.2 之前版本存在安全漏洞，该漏洞源于SaslZkACLProvider或VMParamsAllAndReadonlyDigestZkACLProvider配置，没有现有的安全性。

AI Predicted 7.5 Difficulty: Moderate EPSS 6.72% · P94

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-29262

Vulnerability Information
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Vulnerability Title
Misapplied Zookeeper ACLs can result in leakage of configured authentication and authorization settings
Source: CVE Program / CVE List V5
Vulnerability Description
When starting Apache Solr versions prior to 8.8.2, configured with the SaslZkACLProvider or VMParamsAllAndReadonlyDigestZkACLProvider and no existing security.json znode, if the optional read-only user is configured then Solr would not treat that node as a sensitive path and would allow it to be readable. Additionally, with any ZkACLProvider, if the security.json is already present, Solr will not automatically update the ACLs.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Solr 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Solr是美国阿帕奇（Apache）基金会的一款基于Lucene（一款全文搜索引擎）的搜索服务器。该产品支持层面搜索、垂直搜索、高亮显示搜索结果等。 Apache Solr 8.8.2 之前版本存在安全漏洞，该漏洞源于SaslZkACLProvider或VMParamsAllAndReadonlyDigestZkACLProvider配置，没有现有的安全性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Solr Apache Solr ~ 8.8.2 -

II. Public POCs for CVE-2021-29262

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III. Intelligence Information for CVE-2021-29262

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Vendor Advisories for CVE-2021-29262 (1)

Mailing List Discussions for CVE-2021-29262 (9)

Same Patch Batch · Apache Software Foundation · 2021-04-13 · 4 CVEs total

CVE-2021-27905 SSRF vulnerability with the Replication handler
CVE-2021-29943 Apache Solr Unprivileged users may be able to perform unauthorized read/write to collectio
CVE-2021-29425 Possible limited path traversal vulnerabily in Apache Commons IO

IV. Related Vulnerabilities

Same product: Apache Solr
Same vendor: Apache Software Foundation
Same weakness: CWE-522

V. Comments for CVE-2021-29262

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