Ruby on Rails up to 5.2.4.1/6.0.3.0 ActiveStorage S3 Adapter Content-Length client-side enforcement of server-side security

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Ruby on Rails up to 5.2.4.1/6.0.3.0. Affected by this vulnerability is an unknown functionality of the component ActiveStorage S3 Adapter. Performing a manipulation of the argument Content-Length results in client-side enforcement of server-side security. This vulnerability is reported as CVE-2020-8162. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Ruby on Rails up to 5.2.4.1/6.0.3.0 (Programming Language Software). It has been classified as critical. This affects some unknown functionality of the component ActiveStorage S3 Adapter. The manipulation of the argument Content-Length with an unknown input leads to a client-side enforcement of server-side security vulnerability. CWE is classifying the issue as CWE-602. The product is composed of a server that relies on the client to implement a mechanism that is intended to protect the server. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.

The weakness was disclosed 06/19/2020 (Website). It is possible to read the advisory at groups.google.com. This vulnerability is uniquely identified as CVE-2020-8162 since 01/28/2020. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.2.4.2 or 6.0.3.1 eliminates this vulnerability.

The entry VDB-157048 is pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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
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: Client-side enforcement of server-side security
CWE: CWE-602
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Ruby on Rails 5.2.4.2/6.0.3.1

Timelineinfo

01/28/2020 🔍
06/19/2020 +143 days 🔍
06/20/2020 +1 days 🔍
06/20/2020 +0 days 🔍

Sourcesinfo

Advisory: groups.google.com
Status: Not defined

CVE: CVE-2020-8162 (🔍)
GCVE (CVE): GCVE-0-2020-8162
GCVE (VulDB): GCVE-100-157047
See also: 🔍

Entryinfo

Created: 06/20/2020 08:16
Updated: 06/20/2020 08:21
Changes: 06/20/2020 08:16 (40), 06/20/2020 08:21 (18)
Complete: 🔍
Cache ID: 216::103

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

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