Mozilla Firefox 42 data URI URL input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.2$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Mozilla Firefox 42. The affected element is an unknown function of the component data URI Handler. The manipulation with the input # leads to input validation (URL). This vulnerability is documented as CVE-2015-7211. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox 42 (Web Browser). It has been rated as critical. This issue affects an unknown code of the component data URI Handler. The manipulation with the input value # 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, and integrity. The summary by CVE is:

Mozilla Firefox before 43.0 mishandles the # (number sign) character in a data: URI, which allows remote attackers to spoof web sites via unspecified vectors.

The weakness was released 12/15/2015 by Abdulrahman Alqabandi (musicDespiteEverything) as MFSA2015-141 as confirmed security advisory (Website). It is possible to read the advisory at mozilla.org. The identification of this vulnerability is CVE-2015-7211 since 09/16/2015. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The advisory points out:

Security researcher Abdulrahman Alqabandi reported that when a data: URI is parsed, the hash ('#') symbol is incorrectly handled, allowing for spoofing attacks. This issue could result in the wrong URI being displayed as a location, which can mislead users to believe they are on a different site than the one loaded.

The vulnerability scanner Nessus provides a plugin with the ID 87385 (FreeBSD : mozilla -- multiple vulnerabilities (2c2d1c39-1396-459a-91f5-ca03ee7c64c6)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168484 (OpenSuSE Security Update for seamonkey (openSUSE-SU-2016:0307-1)).

Upgrading to version 43 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 (87385), SecurityFocus (BID 79280†) and Vulnerability Center (SBV-55297†). Entries connected to this vulnerability are available at VDB-79805, VDB-79806, VDB-79807 and VDB-79808. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 87385
Nessus Name: FreeBSD : mozilla -- multiple vulnerabilities (2c2d1c39-1396-459a-91f5-ca03ee7c64c6)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 803852
OpenVAS Name: Mozilla Firefox Multiple Vulnerabilities - Dec15 (Windows)
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 43

Timelineinfo

09/16/2015 🔍
12/15/2015 +90 days 🔍
12/15/2015 +0 days 🔍
12/15/2015 +0 days 🔍
12/15/2015 +0 days 🔍
12/16/2015 +1 days 🔍
12/16/2015 +0 days 🔍
12/16/2015 +0 days 🔍
12/16/2015 +0 days 🔍
07/01/2022 +2389 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA2015-141
Researcher: Abdulrahman Alqabandi (musicDespiteEverything)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7211 (🔍)
GCVE (CVE): GCVE-0-2015-7211
GCVE (VulDB): GCVE-100-79811
SecurityFocus: 79280 - Mozilla Firefox Multiple Security Vulnerabilities
SecurityTracker: 1034426
Vulnerability Center: 55297 - Mozilla Firefox <43 Remote Spoofing Vulnerability - CVE-2015-7211, Medium

See also: 🔍

Entryinfo

Created: 12/16/2015 11:32
Updated: 07/01/2022 08:47
Changes: 12/16/2015 11:32 (72), 05/15/2018 09:12 (11), 07/01/2022 08:47 (3)
Complete: 🔍
Cache ID: 216:952:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!