Mozilla Firefox up to 51.x blob URL input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 51.x. Affected is an unknown function of the component blob Handler. Such manipulation leads to input validation (URL). This vulnerability is listed as CVE-2017-5415. The attack may be performed from remote. In addition, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 51.x (Web Browser). Affected by this issue is some unknown functionality of the component blob Handler. The manipulation with an unknown input leads to a input validation vulnerability (URL). 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. CVE summarizes:

An attack can use a blob URL and script to spoof an arbitrary addressbar URL prefaced by "blob:" as the protocol, leading to user confusion and further spoofing attacks. This vulnerability affects Firefox < 52.

The bug was discovered 03/07/2017. The weakness was presented 03/07/2017 by Abdulrahman Alqabandi (Alex) as MFSA 2017-05 as confirmed security advisory (Website). The advisory is available at mozilla.org. This vulnerability is handled as CVE-2017-5415 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. Technical details are unknown but a public exploit is available.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 97639 (Mozilla Firefox < 52.0 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370325 (Mozilla Firefox Multiple Vulnerabilities (MFSA2017-05,MFSA2017-06)).

Upgrading to version 52 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 Exploit-DB (44266), Tenable (97639), SecurityFocus (BID 96692†) and SecurityTracker (ID 1037966†). See VDB-97756, VDB-97757, VDB-97758 and VDB-97759 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.5

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: URL
Class: Input validation / URL
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97639
Nessus Name: Mozilla Firefox < 52.0 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802170
OpenVAS Name: Mozilla Firefox Security Updates(mfsa_2017-05_2017-07)-Windows
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Firefox 52

Timelineinfo

01/13/2017 🔍
03/07/2017 +53 days 🔍
03/07/2017 +0 days 🔍
03/07/2017 +0 days 🔍
03/07/2017 +0 days 🔍
03/08/2017 +1 days 🔍
03/09/2017 +1 days 🔍
03/10/2017 +1 days 🔍
06/11/2018 +457 days 🔍
06/22/2025 +2568 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2017-05
Researcher: Abdulrahman Alqabandi (Alex)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-5415 (🔍)
GCVE (CVE): GCVE-0-2017-5415
GCVE (VulDB): GCVE-100-97778

OVAL: 🔍

SecurityFocus: 96692 - Mozilla Firefox MFSA 2017-05 Multiple Security Vulnerabilities
OSVDB: - CVE-2017-5415 - Mozilla - Firefox - Spoofing Issue
SecurityTracker: 1037966

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/10/2017 08:14
Updated: 06/22/2025 09:54
Changes: 03/10/2017 08:14 (83), 08/18/2020 15:28 (8), 06/22/2025 09:54 (25)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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