Tor Browser up to 7.0.8 on Linux/macOS file URI information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Tor Browser up to 7.0.8 on Linux/macOS. This affects an unknown part of the component file URI Handler. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2017-16541. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Tor Browser up to 7.0.8 on Linux/macOS (Network Encryption Software). This vulnerability affects an unknown function of the component file URI Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The bug was discovered 11/03/2017. The weakness was shared 11/04/2017 by Holger Fuhrmannek (Alex) (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2017-16541 since 11/04/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 119208 (Scientific Linux Security Update : thunderbird on SL7.x x86_64), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176516 (Debian Security Update for thunderbird (DSA 4327-1)).

Upgrading to version 7.0.9 eliminates this vulnerability. A possible mitigation has been published 2 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119208) and SecurityFocus (BID 101665†). The entries VDB-125761, VDB-125762, VDB-125763 and VDB-125764 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 119208
Nessus Name: Scientific Linux Security Update : thunderbird on SL7.x x86_64
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 100783
OpenVAS Name: Tor Browser Anonymity Feature Bypass Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Reliability: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Browser 7.0.9

Timelineinfo

11/03/2017 🔍
11/03/2017 +0 days 🔍
11/04/2017 +1 days 🔍
11/04/2017 +0 days 🔍
11/04/2017 +0 days 🔍
11/05/2017 +1 days 🔍
11/05/2018 +365 days 🔍
11/27/2018 +22 days 🔍
01/06/2023 +1501 days 🔍

Sourcesinfo

Advisory: RHSA-2018:2692⛔
Researcher: Holger Fuhrmannek (Alex)
Status: Confirmed

CVE: CVE-2017-16541 (🔍)
GCVE (CVE): GCVE-0-2017-16541
GCVE (VulDB): GCVE-100-109144

OVAL: 🔍

SecurityFocus: 101665 - Tor Browser CVE-2017-16541 Information Disclosure Vulnerability
SecurityTracker: 1041610

See also: 🔍

Entryinfo

Created: 11/05/2017 14:43
Updated: 01/06/2023 14:04
Changes: 11/05/2017 14:43 (77), 12/04/2019 15:48 (11), 01/23/2021 08:26 (2), 01/06/2023 14:04 (3)
Complete: 🔍
Cache ID: 216:2D4:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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