Mozilla Firefox up to 67.x Address Bar Unicode input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Mozilla Firefox up to 67.x. Affected is an unknown function of the component Address Bar Handler. Such manipulation as part of Unicode leads to input validation. This vulnerability is referenced as CVE-2019-11721. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 67.x (Web Browser). It has been rated as critical. Affected by this issue is an unknown code block of the component Address Bar Handler. The manipulation as part of a Unicode 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. CVE summarizes:

The unicode latin 'kra' character can be used to spoof a standard 'k' character in the addressbar. This allows for domain spoofing attacks as do not display as punycode text, allowing for user confusion. This vulnerability affects Firefox < 68.

The weakness was published 07/23/2019 (Website). The advisory is shared for download at security.gentoo.org. This vulnerability is handled as CVE-2019-11721 since 05/03/2019. 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 current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/10/2020).

Upgrading to version 68.0 eliminates this vulnerability.

Similar entries are available at VDB-138488, VDB-138489, VDB-138490 and VDB-138491. Once again VulDB remains the best source 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: 6.4
VulDB Meta Temp Score: 6.2

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

NVD Base Score: 6.5
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 68.0

Timelineinfo

05/03/2019 🔍
07/23/2019 +81 days 🔍
07/23/2019 +0 days 🔍
07/10/2020 +353 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: security.gentoo.org
Status: Not defined

CVE: CVE-2019-11721 (🔍)
GCVE (CVE): GCVE-0-2019-11721
GCVE (VulDB): GCVE-100-138500
See also: 🔍

Entryinfo

Created: 07/23/2019 21:45
Updated: 07/10/2020 09:06
Changes: 07/23/2019 21:45 (59), 07/10/2020 09:06 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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