Ruby on Rails up to 5.2.4/6.0.3 MemCacheStore/RedisCacheStore deserialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Ruby on Rails up to 5.2.4/6.0.3. It has been declared as critical. This vulnerability affects unknown code of the component MemCacheStore/RedisCacheStore. Executing a manipulation can lead to deserialization. This vulnerability is tracked as CVE-2020-8165. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Ruby on Rails up to 5.2.4/6.0.3 (Programming Language Software) and classified as critical. This vulnerability affects some unknown processing of the component MemCacheStore/RedisCacheStore. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A deserialization of untrusted data vulnernerability exists in rails < 5.2.5, rails < 6.0.4 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.

The weakness was disclosed 06/19/2020 (Website). The advisory is shared for download at groups.google.com. This vulnerability was named CVE-2020-8165 since 01/28/2020. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 253573 (Linux Distros Unpatched Vulnerability : CVE-2020-8165), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.2.5 or 6.0.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (253573). The entry VDB-157073 is pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
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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Nessus ID: 253573
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-8165

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Ruby on Rails 5.2.5/6.0.4

Timelineinfo

01/28/2020 🔍
06/19/2020 +143 days 🔍
06/21/2020 +2 days 🔍
08/22/2025 +1888 days 🔍

Sourcesinfo

Advisory: groups.google.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-8165 (🔍)
GCVE (CVE): GCVE-0-2020-8165
GCVE (VulDB): GCVE-100-157072
See also: 🔍

Entryinfo

Created: 06/21/2020 10:38
Updated: 08/22/2025 20:29
Changes: 06/21/2020 10:38 (39), 06/21/2020 10:43 (18), 10/26/2020 10:14 (1), 05/09/2025 22:46 (19), 08/22/2025 20:29 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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