sshpk on Node.js Public Key Regular Expression incorrect regex

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in sshpk on Node.js. It has been declared as problematic. This impacts an unknown function of the component Public Key Handler. Such manipulation as part of Regular Expression leads to incorrect regex. This vulnerability is documented as CVE-2018-3737. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in sshpk on Node.js (JavaScript Library) (version now known). Affected by this issue is some unknown processing of the component Public Key Handler. The manipulation as part of a Regular Expression 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:

sshpk is vulnerable to ReDoS when parsing crafted invalid public keys.

The bug was discovered 04/25/2018. The weakness was released 06/07/2018 (Website). The advisory is shared for download at hackerone.com. This vulnerability is handled as CVE-2018-3737 since 12/28/2017. 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.

The vulnerability was handled as a non-public zero-day exploit for at least 42 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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

Productinfo

Type

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

NVD Base Score: 7.5
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: 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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/28/2017 🔍
04/25/2018 +118 days 🔍
06/06/2018 +41 days 🔍
06/07/2018 +1 days 🔍
06/07/2018 +0 days 🔍
02/17/2020 +620 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Not defined

CVE: CVE-2018-3737 (🔍)
GCVE (CVE): GCVE-0-2018-3737
GCVE (VulDB): GCVE-100-119216

Entryinfo

Created: 06/07/2018 10:50
Updated: 02/17/2020 08:06
Changes: 06/07/2018 10:50 (57), 02/17/2020 08:06 (1)
Complete: 🔍
Cache ID: 216::103

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