VDB-112502 · CVE-2017-18076 · Qualys 176290

OmniAuth up to 1.3.1 POST Parameter strategy.rb Callback access control

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in OmniAuth up to 1.3.1. Affected by this issue is an unknown code block of the file strategy.rb of the component POST Parameter Handler. The manipulation with an unknown input leads to a access control vulnerability (Callback). 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. CVE summarizes:

In strategy.rb in OmniAuth before 1.3.2, the authenticity_token value is improperly protected because POST (in addition to GET) parameters are stored in the session and become available in the environment of the callback phase.

The bug was discovered 01/26/2018. The weakness was disclosed 01/26/2018 (Website). The advisory is available at bugs.debian.org. This vulnerability is handled as CVE-2017-18076 since 01/26/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 106727 (Debian DSA-4109-1 : ruby-omniauth - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176290 (Debian Security Update for ruby-omniauth (DSA 4109-1)).

Upgrading to version 1.3.2 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106727). The entries VDB-236839, VDB-239859, VDB-240077 and VDB-247160 are pretty similar.




CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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VulDB Base Score: 🔍
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Name: Callback
Class: Access control / Callback
CWE: CWE-284 / CWE-266

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍


Nessus ID: 106727
Nessus Name: Debian DSA-4109-1 : ruby-omniauth - security update
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 830041
OpenVAS Name: Debian Security Advisory DSA 4109-1 (ruby-omniauth - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Exposure Time: 🔍

Upgrade: OmniAuth 1.3.2
Patch: github.com


01/26/2018 🔍
01/26/2018 +0 days 🔍
01/26/2018 +0 days 🔍
01/26/2018 +0 days 🔍
01/27/2018 +1 days 🔍
02/09/2018 +13 days 🔍
02/12/2018 +3 days 🔍
02/02/2023 +1816 days 🔍


Advisory: bugs.debian.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-18076 (🔍)
See also: 🔍


Created: 01/27/2018 09:47 AM
Updated: 02/02/2023 07:06 PM
Changes: 01/27/2018 09:47 AM (74), 12/28/2019 09:30 AM (3), 02/02/2023 07:06 PM (4)
Complete: 🔍
Cache ID: 44:1AF:40


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