Mozilla Firefox up to 58.x Fetch API information disclosure

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

Summaryinfo

A vulnerability labeled as problematic has been found in Mozilla Firefox up to 58.x. Affected is an unknown function of the component Fetch API. Such manipulation leads to information disclosure. This vulnerability is referenced as CVE-2018-5131. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 58.x (Web Browser). It has been rated as critical. Affected by this issue is an unknown part of the component Fetch API. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, integrity, and availability.

The bug was discovered 03/13/2018. The weakness was published 03/13/2018 by Christian Holler (Nils) with Mozilla as MFSA2018-06 as confirmed security advisory (Website). The advisory is shared for download at mozilla.org. This vulnerability is handled as CVE-2018-5131 since 01/03/2018. 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 MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 108394 (Oracle Linux 7 : firefox (ELSA-2018-0527)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370821 (Mozilla Firefox Multiple Vulnerabilities (mfsa2018-06 and mfsa2018-07)).

Upgrading to version 59 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 (108394), SecurityFocus (BID 103388†) and SecurityTracker (ID 1040514†). Similar entries are available at VDB-114730, VDB-114731, VDB-114732 and VDB-114733. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

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

NVD Base Score: 5.9
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 108394
Nessus Name: Oracle Linux 7 : firefox (ELSA-2018-0527)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 702986
OpenVAS Name: CentOS Update for firefox CESA-2018:0527 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 59

Timelineinfo

01/03/2018 🔍
03/13/2018 +69 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/13/2018 +0 days 🔍
03/16/2018 +3 days 🔍
03/18/2018 +2 days 🔍
06/11/2018 +84 days 🔍
11/26/2025 +2725 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA2018-06
Researcher: Christian Holler (Nils)
Organization: Mozilla
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-5131 (🔍)
GCVE (CVE): GCVE-0-2018-5131
GCVE (VulDB): GCVE-100-114740

OVAL: 🔍

SecurityFocus: 103388 - Mozilla Firefox and Firefox ESR Multiple Security Vulnerabilities
SecurityTracker: 1040514

See also: 🔍

Entryinfo

Created: 03/18/2018 10:30
Updated: 11/26/2025 07:33
Changes: 03/18/2018 10:30 (79), 02/17/2020 20:44 (10), 02/05/2021 12:28 (2), 11/26/2025 07:33 (16)
Complete: 🔍
Cache ID: 216::103

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