Mozilla Firefox up to 52 Unicode input validation

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

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 52. It has been declared as problematic. The impacted element is an unknown function of the component Unicode Handler. Such manipulation leads to input validation. This vulnerability is documented as CVE-2017-5449. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Mozilla Firefox up to 52 (Web Browser). Affected by this issue is some unknown processing of the component Unicode 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 availability. CVE summarizes:

A possibly exploitable crash triggered during layout and manipulation of bidirectional unicode text in concert with CSS animations. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 52.1, and Firefox < 53.

The bug was discovered 04/19/2017. The weakness was released 04/19/2017 by Huzaifa Sidhpurwala with Zero Day Initiative as MFSA 2017-10 as confirmed security advisory (Website). The advisory is shared for download at mozilla.org. This vulnerability is handled as CVE-2017-5449 since 01/13/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 100687 (EulerOS 2.0 SP1 : firefox (EulerOS-SA-2017-1092)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157437 (Oracle Enterprise Linux Security Update for firefox (ELSA-2017-1104)).

Upgrading to version 53 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 (100687), SecurityFocus (BID 97940†) and SecurityTracker (ID 1038320†). Entries connected to this vulnerability are available at VDB-100289, VDB-100290, VDB-100291 and VDB-100292. 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: 5.9
VulDB Meta Temp Score: 5.8

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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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: 100687
Nessus Name: EulerOS 2.0 SP1 : firefox (EulerOS-SA-2017-1092)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for thunderbird CESA-2017:1201 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 53

Timelineinfo

01/13/2017 🔍
04/19/2017 +96 days 🔍
04/19/2017 +0 days 🔍
04/19/2017 +0 days 🔍
04/19/2017 +0 days 🔍
04/20/2017 +1 days 🔍
04/20/2017 +0 days 🔍
06/09/2017 +50 days 🔍
06/11/2018 +366 days 🔍
11/26/2025 +2725 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2017-10
Researcher: Huzaifa Sidhpurwala
Organization: Zero Day Initiative
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-5449 (🔍)
GCVE (CVE): GCVE-0-2017-5449
GCVE (VulDB): GCVE-100-100316

OVAL: 🔍

SecurityFocus: 97940 - Mozilla Firefox Multiple Security Vulnerabilities
OSVDB: - CVE-2017-5449 - Mozilla - Multiple Products - Denial of Service Issue
SecurityTracker: 1038320

See also: 🔍

Entryinfo

Created: 04/20/2017 14:54
Updated: 11/26/2025 03:31
Changes: 04/20/2017 14:54 (82), 09/18/2020 14:59 (8), 11/26/2025 03:31 (18)
Complete: 🔍
Cache ID: 216::103

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