What’s Vulnerable › Vulnerabilities

CVE-2017-16541

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-11-04 · updated 2026-06-17
• Weakness: CWE-200

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.

Affected products

• Debian Linux: 8.0, 9.0
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Eus: 7.5, 7.6, 7.7
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.6, 7.7
• RedHat Enterprise Linux Server Tus: 7.6, 7.7
• RedHat Enterprise Linux Workstation: 6.0, 7.0
• torproject Tor: before 7.0.9 — fixed in 7.0.9

How to fix

Upgrade to a fixed version: torproject Tor 7.0.9. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/101665
• http://www.securitytracker.com/id/1041610
• https://access.redhat.com/errata/RHSA-2018:2692
• https://access.redhat.com/errata/RHSA-2018:2693
• https://access.redhat.com/errata/RHSA-2018:3403
• https://access.redhat.com/errata/RHSA-2018:3458
• https://blog.torproject.org/tor-browser-709-released
• https://bugzilla.mozilla.org/show_bug.cgi?id=1412081
• https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
• https://security.gentoo.org/glsa/201810-01
• https://security.gentoo.org/glsa/201811-13
• https://trac.torproject.org/projects/tor/ticket/24052

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