Marshmallow Library up to 2.15.0/3.0.0b8 on Python 7pk security

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Marshmallow Library up to 2.15.0/3.0.0b8 on Python. Affected by this vulnerability is an unknown functionality. The manipulation leads to 7pk security. This vulnerability is listed as CVE-2018-17175. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Marshmallow Library up to 2.15.0/3.0.0b8 on Python (Software Library) and classified as problematic. This issue affects an unknown functionality. The manipulation with an unknown input leads to a 7pk security vulnerability. Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality. The summary by CVE is:

In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python, the schema "only" option treats an empty list as implying no "only" option, which allows a request that was intended to expose no fields to instead expose all fields (if the schema is being filtered dynamically using the "only" option, and there is a user role that produces an empty value for "only").

The bug was discovered 04/12/2018. The weakness was presented 09/18/2018 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2018-17175 since 09/18/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 159 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118046 (Fedora 27 : python-marshmallow (2018-8b109a6de0)), 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 277571 (Fedora Security Update for python-marshmallow (FEDORA-2018-cc9adc4808)).

Upgrading to version 2.15.1 or 3.0.0b9 eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118046). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Software Library

Name

• Marshmallow Library

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15.0
• 3.0.0b8

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

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

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