Blynk up to 0.39.6 blynk-server path traversal

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Blynk up to 0.39.6. It has been declared as critical. This vulnerability affects unknown code of the component blynk-server. The manipulation with the input ../ leads to path traversal. This vulnerability was named CVE-2018-17785. The attack can be initiated remotely. There is no exploit available. It is recommended to upgrade the affected component. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability was found in Blynk up to 0.39.6. It has been classified as critical. This affects an unknown code of the component blynk-server. The manipulation with the input value ../ leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In blynk-server in Blynk before 0.39.7, Directory Traversal exists via a ../ in a URI that has /static or /static/js at the beginning, as demonstrated by reading the /etc/passwd file.

The bug was discovered 09/30/2018. The weakness was released 09/30/2018 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2018-17785 since 09/30/2018. The exploitability is told to be easy. 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 T1006 according to MITRE ATT&CK.

Upgrading to version 0.39.7 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Blynk 0.39.7

Timelineinfo

09/30/2018 🔍
09/30/2018 +0 days 🔍
09/30/2018 +0 days 🔍
09/30/2018 +0 days 🔍
10/01/2018 +1 days 🔍
05/19/2023 +1691 days 🔍

Sourcesinfo

Advisory: 1256
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-17785 (🔍)
GCVE (CVE): GCVE-0-2018-17785
GCVE (VulDB): GCVE-100-124611

Entryinfo

Created: 10/01/2018 07:41 AM
Updated: 05/19/2023 02:39 PM
Changes: 10/01/2018 07:41 AM (57), 03/28/2020 10:30 AM (2), 05/19/2023 02:39 PM (5)
Complete: 🔍
Cache ID: 18:5FD:40

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