CVE-2017-16541

Mozilla: Proxy bypass using automount and autofs

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El navegador Tor en versiones anteriores a la 7.0.9 en macOS y Linux permite que atacantes remotos sin omitan las características de anonimato previstas y descubran una dirección IP de cliente mediante vectores que impliquen un sitio web manipulado que aproveche la mala gestión de file:// en Firefox. Esto también se conoce como TorMoil. NOTA: Tails no se ha visto afectado.

Firefox proxy settings can be bypassed by using the automount feature with autofs to create a mount point on the local file system. Content can be loaded from this mounted file system directly using a `file:` URI, bypassing configured proxy settings. This issue only affects OS X in default configuration; on Linux systems, autofs must also be installed for the vulnerability to occur.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-11-04 CVE Reserved
2017-11-04 CVE Published
2021-03-29 First Exploit
2024-08-05 CVE Updated
2024-10-07 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (18)

URL	Tag	Source
http://www.securityfocus.com/bid/101665	Broken Link
http://www.securitytracker.com/id/1041610	Broken Link
https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html	Mailing List
https://www.bleepingcomputer.com/news/security/tormoil-vulnerability-leaks-real-ip-address-from-tor-browser-users	Issue Tracking
https://www.wearesegment.com/research/tormoil-torbrowser-unspecified-critical-security-vulnerability	Issue Tracking

URL	Date	SRC
https://github.com/Ethan-Chen-uwo/A-breif-introduction-of-CVE-2017-16541	2021-03-29
https://bugzilla.mozilla.org/show_bug.cgi?id=1412081	2024-08-05

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:2692	2022-04-18
https://access.redhat.com/errata/RHSA-2018:2693	2022-04-18
https://access.redhat.com/errata/RHSA-2018:3403	2022-04-18
https://access.redhat.com/errata/RHSA-2018:3458	2022-04-18
https://blog.torproject.org/tor-browser-709-released	2022-04-18
https://security.gentoo.org/glsa/201810-01	2022-04-18
https://security.gentoo.org/glsa/201811-13	2022-04-18
https://trac.torproject.org/projects/tor/ticket/24052	2022-04-18
https://www.debian.org/security/2018/dsa-4327	2022-04-18
https://access.redhat.com/security/cve/CVE-2017-16541	2018-11-05
https://bugzilla.redhat.com/show_bug.cgi?id=1510816	2018-11-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Torproject Search vendor "Torproject"	Tor Search vendor "Torproject" for product "Tor"	< 7.0.9 Search vendor "Torproject" for product "Tor" and version " < 7.0.9"	-	Affected	in	Apple Search vendor "Apple"	Macos Search vendor "Apple" for product "Macos"	-	-	Safe
Torproject Search vendor "Torproject"	Tor Search vendor "Torproject" for product "Tor"	< 7.0.9 Search vendor "Torproject" for product "Tor" and version " < 7.0.9"	-	Affected	in	Linux Search vendor "Linux"	Linux Kernel Search vendor "Linux" for product "Linux Kernel"	-	-	Safe
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				6.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				7.5 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.5"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				7.7 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "7.7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				6.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				7.7 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				7.7 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				6.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected