Mozilla Firefox up to 56 data URL CSP 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 was found in Mozilla Firefox up to 56 and classified as critical. Affected by this issue is some unknown functionality of the component data URL Handler. The manipulation results in cross site scripting (CSP). This vulnerability is known as CVE-2017-7834. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Mozilla Firefox up to 56 (Web Browser). Affected is an unknown code of the component data URL Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability (CSP). CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

A "data:" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when "data:" documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks. This vulnerability affects Firefox < 57.

The bug was discovered 11/14/2017. The weakness was published 06/11/2018 with Mozilla as Bug 1358009 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.mozilla.org. This vulnerability is traded as CVE-2017-7834 since 04/12/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

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. Once again VulDB remains the best source for 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

Name: CSP
Class: Cross site scripting / CSP
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 1358009
Organization: Mozilla
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7834 (🔍)
GCVE (CVE): GCVE-0-2017-7834
GCVE (VulDB): GCVE-100-119340

OVAL: 🔍

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

See also: 🔍

Entryinfo

Created: 06/12/2018 08:53
Updated: 03/22/2023 13:09
Changes: 06/12/2018 08:53 (80), 02/18/2020 08:15 (5), 03/22/2023 13:09 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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