Mozilla Firefox up to 56 javascript URL Control Character cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Mozilla Firefox up to 56. The affected element is an unknown function of the component javascript URL Handler. The manipulation as part of Control Character leads to cross site scripting. This vulnerability is referenced as CVE-2017-7839. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 56 (Web Browser) and classified as critical. This issue affects some unknown functionality of the component javascript URL Handler. The manipulation as part of a Control Character leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Control characters prepended before "javascript:" URLs pasted in the addressbar can cause the leading characters to be ignored and the pasted JavaScript to be executed instead of being blocked. This could be used in social engineering and self-cross-site-scripting (self-XSS) attacks where users are convinced to copy and paste text into the addressbar. This vulnerability affects Firefox < 57.

The bug was discovered 11/14/2017. The weakness was published 06/11/2018 with Mozilla as Bug 1402896 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.mozilla.org. The identification of this vulnerability is CVE-2017-7839 since 04/12/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 104564 (FreeBSD : mozilla -- multiple vulnerabilities (f78eac48-c3d1-4666-8de5-63ceea25a578)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370658 (Mozilla Firefox Multiple Vulnerabilities. (mfsa2017-24,mfsa2017-25)).

Upgrading to version 57 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104564) and SecurityFocus (BID 101832†). Similar entries are available at VDB-119332, VDB-119333, VDB-119334 and VDB-119336. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: 104564
Nessus Name: FreeBSD : mozilla -- multiple vulnerabilities (f78eac48-c3d1-4666-8de5-63ceea25a578)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 803118
OpenVAS Name: Ubuntu Update for firefox USN-3477-4
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 57

Timelineinfo

04/12/2017 🔍
11/14/2017 +216 days 🔍
11/14/2017 +0 days 🔍
11/14/2017 +0 days 🔍
11/15/2017 +1 days 🔍
06/11/2018 +207 days 🔍
06/11/2018 +0 days 🔍
06/12/2018 +1 days 🔍
03/22/2023 +1744 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: Bug 1402896
Organization: Mozilla
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7839 (🔍)
GCVE (CVE): GCVE-0-2017-7839
GCVE (VulDB): GCVE-100-119345

OVAL: 🔍

SecurityFocus: 101832 - Mozilla Firefox Prior to 57 Multiple Security Vulnerabilities
SecurityTracker: 1039803

See also: 🔍

Entryinfo

Created: 06/12/2018 08:55
Updated: 03/22/2023 13:37
Changes: 06/12/2018 08:55 (80), 02/18/2020 08:30 (5), 03/22/2023 13:37 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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