ansi2html on Node.js Regular Expression 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 (≈)
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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.
6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in ansi2html on Node.js. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component Regular Expression. The manipulation results in input validation. This vulnerability is cataloged as CVE-2015-9239. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in ansi2html on Node.js (JavaScript Library) (version now known). Affected is some unknown processing of the component Regular Expression. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

ansi2html is vulnerable to regular expression denial of service (ReDoS) when certain types of user input is passed in.

The bug was discovered 10/25/2015. The weakness was shared 05/31/2018 (Website). The advisory is shared for download at nodesecurity.io. This vulnerability is traded as CVE-2015-9239 since 10/29/2017. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 949 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.

Once again VulDB remains the best source for vulnerability data.

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: 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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/25/2015 🔍
10/29/2017 +735 days 🔍
05/31/2018 +213 days 🔍
05/31/2018 +0 days 🔍
06/01/2018 +1 days 🔍
02/10/2020 +619 days 🔍

Sourcesinfo

Advisory: nodesecurity.io
Status: Not defined

CVE: CVE-2015-9239 (🔍)
GCVE (CVE): GCVE-0-2015-9239
GCVE (VulDB): GCVE-100-118404

Entryinfo

Created: 06/01/2018 09:25
Updated: 02/10/2020 09:07
Changes: 06/01/2018 09:25 (56), 02/10/2020 09:07 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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