Brave Browser up to 0.12.x JavaScript alert resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Brave Browser up to 0.12.x. It has been classified as problematic. This affects the function alert of the component JavaScript Handler. The manipulation leads to resource management. This vulnerability is listed as CVE-2017-18256. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Brave Browser up to 0.12.x and classified as problematic. This issue affects the function alert of the component JavaScript Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource consumption) via a long alert() argument in JavaScript code, because window dialogs are mishandled.

The bug was discovered 02/11/2017. The weakness was presented 04/04/2018 (Website). The advisory is shared at hackerone.com. The identification of this vulnerability is CVE-2017-18256 since 04/03/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 416 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 0.13.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (44474). See VDB-115672 for similar entry. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
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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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Brave Browser 0.13.0

Timelineinfo

02/11/2017 🔍
04/03/2018 +416 days 🔍
04/03/2018 +0 days 🔍
04/04/2018 +1 days 🔍
04/04/2018 +0 days 🔍
12/03/2025 +2800 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-18256 (🔍)
GCVE (CVE): GCVE-0-2017-18256
GCVE (VulDB): GCVE-100-115673
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 04/04/2018 12:44
Updated: 12/03/2025 11:50
Changes: 04/04/2018 12:44 (60), 01/21/2020 09:54 (5), 12/03/2025 11:50 (19)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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