Flask-Security URL Validation get_post_logout_redirect/get_post_login_redirect

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Flask-Security. It has been declared as critical. This affects the function get_post_logout_redirect/get_post_login_redirect of the component URL Validation Handler. Such manipulation leads to redirect. This vulnerability is documented as CVE-2021-23385. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Flask-Security (version now known). Affected by this issue is the function get_post_logout_redirect/get_post_login_redirect of the component URL Validation Handler. The manipulation with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is confidentiality, integrity, and availability. CVE summarizes:

This affects all versions of package Flask-Security. When using the get_post_logout_redirect and get_post_login_redirect functions, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False. **Note:** Flask-Security is not maintained anymore.

The weakness was released 08/03/2022. The advisory is available at snyk.io. This vulnerability is handled as CVE-2021-23385 since 01/08/2021. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

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

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Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CNA Base Score: 5.4
CNA Vector (Snyk): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Redirect
CWE: CWE-601
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/08/2021 🔍
08/03/2022 +571 days 🔍
08/03/2022 +0 days 🔍
08/30/2022 +27 days 🔍

Sourcesinfo

Advisory: snyk.io
Status: Not defined

CVE: CVE-2021-23385 (🔍)
GCVE (CVE): GCVE-0-2021-23385
GCVE (VulDB): GCVE-100-205526

Entryinfo

Created: 08/03/2022 10:41
Updated: 08/30/2022 07:47
Changes: 08/03/2022 10:41 (36), 08/30/2022 07:47 (21)
Complete: 🔍
Cache ID: 216::103

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