Ruby on Rails up to 5.2.2.0/6.0.0.beta2 Development Mode input validation

CVSS Meta Temp Score
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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
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8.4$0-$5k0.00

A vulnerability classified as critical was found in Ruby on Rails up to 5.2.2.0/6.0.0.beta2 (Programming Language Software). Affected by this vulnerability is an unknown functionality of the component Development Mode. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess the automatically generated development mode secret token. This secret token can be used in combination with other Rails internals to escalate to a remote code execution exploit.

The bug was discovered 03/13/2019. The weakness was presented 03/27/2019 (Website). The advisory is shared at groups.google.com. This vulnerability is known as CVE-2019-5420 since 01/04/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13442 (Ruby on Rails Multiple Security Vulnerabilities).

Upgrading to version 5.2.2.1 or 6.0.0.beta3 eliminates this vulnerability.

See 132551 and 132552 for similar entries.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Ruby on Rails 5.2.2.1/6.0.0.beta3

Timelineinfo

01/04/2019 🔍
03/13/2019 +68 days 🔍
03/27/2019 +14 days 🔍
03/28/2019 +1 days 🔍
08/17/2023 +1603 days 🔍

Sourcesinfo

Advisory: 152704
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-5420 (🔍)
See also: 🔍

Entryinfo

Created: 03/28/2019 14:21
Updated: 08/17/2023 12:13
Changes: 03/28/2019 14:21 (60), 05/22/2020 14:46 (2), 08/17/2023 12:05 (5), 08/17/2023 12:13 (1)
Complete: 🔍

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