OnionShare up to 1.3.1 web/web.py debug_mode input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in OnionShare up to 1.3.1 and classified as critical. This affects the function debug_mode of the file web/web.py. Such manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2018-19960. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OnionShare up to 1.3.1. Affected by this issue is the function debug_mode of the file web/web.py. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The debug_mode function in web/web.py in OnionShare through 1.3.1, when --debug is enabled, uses the /tmp/onionshare_server.log pathname for logging, which might allow local users to overwrite files or obtain sensitive information by using this pathname.

The bug was discovered 12/07/2018. The weakness was disclosed 12/07/2018 (Website). The advisory is shared for download at bugs.debian.org. This vulnerability is handled as CVE-2018-19960 since 12/07/2018. The attack needs to be approached locally. A simple authentication is needed for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 241625 (Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : OnionShare vulnerabilities (USN-7625-1)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (241625). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.1

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

NVD Base Score: 7.0
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: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 241625
Nessus Name: Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : OnionShare vulnerabilities (USN-7625-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/07/2018 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
12/08/2018 +1 days 🔍
07/10/2025 +2406 days 🔍

Sourcesinfo

Advisory: bugs.debian.org
Status: Not defined

CVE: CVE-2018-19960 (🔍)
GCVE (CVE): GCVE-0-2018-19960
GCVE (VulDB): GCVE-100-127712

Entryinfo

Created: 12/08/2018 09:55
Updated: 07/10/2025 09:14
Changes: 12/08/2018 09:55 (56), 04/19/2020 09:06 (1), 07/10/2025 09:14 (17)
Complete: 🔍
Cache ID: 216::103

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

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