Node.js 8.x/9.x Encoding Buffer.alloc information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Node.js 8.x/9.x. This vulnerability affects the function Buffer.alloc of the component Encoding Handler. Performing a manipulation results in information disclosure. This vulnerability is reported as CVE-2017-15897. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Node.js 8.x/9.x (JavaScript Library). This affects the function Buffer.alloc of the component Encoding Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Node.js had a bug in versions 8.X and 9.X which caused buffers to not be initialized when the encoding for the fill value did not match the encoding specified. For example, 'Buffer.alloc(0x100, "This is not correctly encoded", "hex");' The buffer implementation was updated such that the buffer will be initialized to all zeros in these cases.

The bug was discovered 12/08/2017. The weakness was disclosed 12/11/2017 (Website). It is possible to read the advisory at nodejs.org. This vulnerability is uniquely identified as CVE-2017-15897 since 10/25/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105259 (FreeBSD : node.js -- Data Confidentiality/Integrity Vulnerability, December 2017 (bea84a7a-e0c9-11e7-b4f3-11baa0c2df21)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (105259). The entry VDB-110486 is pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.1
VulDB Meta Temp Score: 4.0

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.1
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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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Nessus ID: 105259
Nessus Name: FreeBSD : node.js -- Data Confidentiality/Integrity Vulnerability, December 2017 (bea84a7a-e0c9-11e7-b4f3-11baa0c2df21)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

10/25/2017 🔍
12/08/2017 +44 days 🔍
12/11/2017 +3 days 🔍
12/11/2017 +0 days 🔍
12/12/2017 +1 days 🔍
12/14/2017 +2 days 🔍
12/15/2017 +1 days 🔍
12/13/2019 +728 days 🔍

Sourcesinfo

Advisory: nodejs.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-15897 (🔍)
GCVE (CVE): GCVE-0-2017-15897
GCVE (VulDB): GCVE-100-110487
See also: 🔍

Entryinfo

Created: 12/12/2017 07:58
Updated: 12/13/2019 19:33
Changes: 12/12/2017 07:58 (68), 12/13/2019 19:33 (4)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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