Mozilla Firefox up to 50 Marquee Tag Content Security Policy 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 50. It has been classified as critical. Affected by this issue is some unknown functionality of the component Marquee Tag Handler. Performing a manipulation results in 7pk security (Content Security Policy). This vulnerability is identified as CVE-2016-9895. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Mozilla Firefox up to 50 (Web Browser). This affects an unknown code block of the component Marquee Tag Handler. The manipulation with an unknown input leads to a 7pk security vulnerability (Content Security Policy). CWE is classifying the issue as CWE-254. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Event handlers on "marquee" elements were executed despite a strict Content Security Policy (CSP) that disallowed inline JavaScript. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

The bug was discovered 12/13/2016. The weakness was released 12/13/2016 by Christian Holler (Nils) as MFSA 2016-94 as confirmed security advisory (Website). It is possible to read the advisory at mozilla.org. This vulnerability is uniquely identified as CVE-2016-9895 since 12/07/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 900006 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236208 (Red Hat Update Firefox Security (RHSA-2016:2946)).

Upgrading to version 50.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (900006) and SecurityFocus (BID 94885†). Entries connected to this vulnerability are available at VDB-94489, VDB-94490, VDB-94492 and VDB-94493. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
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

Name: Content Security Policy
Class: 7pk security / Content Security Policy
CWE: CWE-254
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: 900006
Nessus File: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for thunderbird CESA-2016:2973 centos7
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Firefox 50.1

Timelineinfo

12/07/2016 🔍
12/13/2016 +6 days 🔍
12/13/2016 +0 days 🔍
12/13/2016 +0 days 🔍
12/13/2016 +0 days 🔍
12/15/2016 +2 days 🔍
06/11/2018 +542 days 🔍
11/25/2025 +2725 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2016-94
Researcher: Christian Holler (Nils)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9895 (🔍)
GCVE (CVE): GCVE-0-2016-9895
GCVE (VulDB): GCVE-100-94491

OVAL: 🔍

SecurityFocus: 94885 - Mozilla Firefox MFSA2016-94 and MFSA2016-95 Multiple Security Vulnerabilities
SecurityTracker: 1037461

See also: 🔍

Entryinfo

Created: 12/15/2016 10:45
Updated: 11/25/2025 23:18
Changes: 12/15/2016 10:45 (74), 07/07/2019 21:10 (7), 10/08/2022 16:12 (3), 11/25/2025 23:18 (15)
Complete: 🔍
Cache ID: 216::103

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