Mozilla Firefox up to 53.x Unicode Character input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Mozilla Firefox up to 53.x. Impacted is an unknown function of the component Unicode Character Handler. The manipulation leads to input validation. This vulnerability is listed as CVE-2017-7764. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 53.x (Web Browser). This issue affects some unknown functionality of the component Unicode Character Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability.

The bug was discovered 06/13/2017. The weakness was presented 06/13/2017 by Holger Fuhrmannek (Nils) with Microsoft Vulnerability Research as MFSA 2017-15 as confirmed security advisory (Website). It is possible to read the advisory at mozilla.org. The identification of this vulnerability is CVE-2017-7764 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. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 101055 (SUSE SLED12 / SLES12 Security Update : MozillaFirefox, MozillaFirefox-branding-SLE (SUSE-SU-2017:1669-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176060 (Debian Security Update for firefox-esr (DSA 3881-1)).

Upgrading to version 54.0 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 (101055), SecurityFocus (BID 99057†) and SecurityTracker (ID 1038689†). See VDB-102487, VDB-102488, VDB-102489 and VDB-102490 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

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

NVD Base Score: 5.3
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: Input validation
CWE: CWE-20
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: 101055
Nessus Name: SUSE SLED12 / SLES12 Security Update : MozillaFirefox, MozillaFirefox-branding-SLE (SUSE-SU-2017:1669-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for thunderbird CESA-2017:1561 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 54.0

Timelineinfo

04/12/2017 🔍
06/13/2017 +62 days 🔍
06/13/2017 +0 days 🔍
06/13/2017 +0 days 🔍
06/13/2017 +0 days 🔍
06/14/2017 +1 days 🔍
06/14/2017 +0 days 🔍
06/27/2017 +13 days 🔍
06/11/2018 +348 days 🔍
11/26/2025 +2725 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2017-15
Researcher: Holger Fuhrmannek (Nils)
Organization: Microsoft Vulnerability Research
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7764 (🔍)
GCVE (CVE): GCVE-0-2017-7764
GCVE (VulDB): GCVE-100-102503

OVAL: 🔍

SecurityFocus: 99057 - Mozilla Firefox Multiple Security Vulnerabilities
SecurityTracker: 1038689

See also: 🔍

Entryinfo

Created: 06/14/2017 17:35
Updated: 11/26/2025 05:14
Changes: 06/14/2017 17:35 (81), 10/17/2019 20:02 (8), 12/28/2020 15:35 (3), 11/26/2025 05:14 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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