OnionShare up to 0.9.0 hs.py access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in OnionShare up to 0.9.0. It has been rated as problematic. Impacted is an unknown function of the file hs.py. The manipulation leads to access control. This vulnerability is traded as CVE-2016-5026. An attack has to be approached locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in OnionShare up to 0.9.0. It has been rated as problematic. This issue affects an unknown function of the file hs.py. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

hs.py in OnionShare before 0.9.1 allows local users to modify the hiddenservice by pre-creating the /tmp/onionshare directory.

The bug was discovered 05/23/2016. The weakness was shared 01/30/2017 by Michael Scherer (Website). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2016-5026 since 05/24/2016. Attacking locally is a requirement. The successful exploitation requires a simple authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 236 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 96505 (Fedora 24 : onionshare (2017-cdf8277947)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276404 (Fedora Security Update for onionshare (FEDORA-2017-e6a9108cce)).

Upgrading to version 0.9.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (96505) and SecurityFocus (BID 90821†). 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: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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: Access control
CWE: CWE-284 / CWE-266
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: 96505
Nessus Name: Fedora 24 : onionshare (2017-cdf8277947)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for onionshare FEDORA-2017-e6a9108cce
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OnionShare 0.9.1

Timelineinfo

05/23/2016 🔍
05/23/2016 +0 days 🔍
05/24/2016 +1 days 🔍
01/14/2017 +235 days 🔍
01/16/2017 +2 days 🔍
01/30/2017 +14 days 🔍
01/30/2017 +0 days 🔍
01/31/2017 +1 days 🔍
09/28/2024 +2797 days 🔍

Sourcesinfo

Advisory: FEDORA-2017-cdf8277947
Researcher: Michael Scherer
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5026 (🔍)
GCVE (CVE): GCVE-0-2016-5026
GCVE (VulDB): GCVE-100-96299
SecurityFocus: 90821 - OnionShare '/tmp/onionshare' Directory Local Security Bypass Vulnerability
OSVDB: - CVE-2016-5026 - OnionShare - Security Bypass Issue

Entryinfo

Created: 01/31/2017 09:52
Updated: 09/28/2024 07:00
Changes: 01/31/2017 09:52 (69), 08/07/2020 16:28 (8), 11/11/2022 09:33 (3), 09/28/2024 07:00 (16)
Complete: 🔍
Cache ID: 216::103

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

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