VDB-149548 · CVE-2020-7965 · GCVE-0-2020-7965

webargs up to 5.5.2 Header flaskparser.py Content-Type Header cross-site request forgery

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic was found in webargs up to 5.5.2. This vulnerability affects unknown code of the file flaskparser.py of the component Header Handler. Executing a manipulation as part of Content-Type Header can lead to cross-site request forgery. This vulnerability appears as CVE-2020-7965. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in webargs up to 5.5.2 and classified as problematic. This vulnerability affects an unknown function of the file flaskparser.py of the component Header Handler. The manipulation as part of a Content-Type Header leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. CVE summarizes:

flaskparser.py in Webargs 5.x through 5.5.2 doesn't check that the Content-Type header is application/json when receiving JSON input. If the request body is valid JSON, it will accept it even if the content type is application/x-www-form-urlencoded. This allows for JSON POST requests to be made across domains, leading to CSRF.

The weakness was presented 01/29/2020 (Website). The advisory is shared for download at webargs.readthedocs.io. This vulnerability was named CVE-2020-7965 since 01/24/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

webargs

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/24/2020 🔍
01/29/2020 +5 days 🔍
01/30/2020 +1 days 🔍
01/30/2020 +0 days 🔍

Sourcesinfo

Advisory: webargs.readthedocs.io
Status: Not defined

CVE: CVE-2020-7965 (🔍)
GCVE (CVE): GCVE-0-2020-7965
GCVE (VulDB): GCVE-100-149548

Entryinfo

Created: 01/30/2020 08:35
Updated: 01/30/2020 08:40
Changes: 01/30/2020 08:35 (38), 01/30/2020 08:40 (17)
Complete: 🔍
Cache ID: 216::103