VDB-155984 · CVE-2020-7662 · GCVE-0-2020-7662

websocket-extensions up to 1.0.3 on npm Regex Backslash incorrect regex

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.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in websocket-extensions up to 1.0.3 on npm. This issue affects some unknown processing of the component Regex Handler. Such manipulation as part of Backslash leads to incorrect regex. This vulnerability is traded as CVE-2020-7662. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in websocket-extensions up to 1.0.3 on npm and classified as problematic. Affected by this issue is an unknown part of the component Regex Handler. The manipulation as part of a Backslash leads to a incorrect regex vulnerability. Using CWE to declare the problem leads to CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. Impacted is availability. CVE summarizes:

websocket-extensions npm module prior to 1.0.4 allows Denial of Service (DoS) via Regex Backtracking. The extension parser may take quadratic time when parsing a header containing an unclosed string parameter value whose content is a repeating two-byte sequence of a backslash and some other character. This could be abused by an attacker to conduct Regex Denial Of Service (ReDoS) on a single-threaded server by providing a malicious payload with the Sec-WebSocket-Extensions header.

The weakness was shared 06/02/2020. This vulnerability is handled as CVE-2020-7662 since 01/21/2020. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.0.4 eliminates this vulnerability.

The entry VDB-155985 is related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

NPM Package

Name

websocket-extensions

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Incorrect regex
CWE: CWE-185 / CWE-697
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: websocket-extensions 1.0.4

Timelineinfo

01/21/2020 🔍
06/02/2020 +133 days 🔍
06/03/2020 +1 days 🔍
06/03/2020 +0 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-7662 (🔍)
GCVE (CVE): GCVE-0-2020-7662
GCVE (VulDB): GCVE-100-155984
See also: 🔍

Entryinfo

Created: 06/03/2020 08:22
Updated: 06/03/2020 08:27
Changes: 06/03/2020 08:22 (39), 06/03/2020 08:27 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.