RubyGems up to 2.0.16/2.2.4/2.4.7 Request Hostname input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in RubyGems up to 2.0.16/2.2.4/2.4.7. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Request Handler. Executing a manipulation of the argument Hostname can lead to input validation. This vulnerability is registered as CVE-2015-4020. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in RubyGems up to 2.0.16/2.2.4/2.4.7 (Programming Language Software) and classified as critical. This vulnerability affects some unknown processing of the component Request Handler. The manipulation of the argument hostname 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. CVE summarizes:

RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8 does not validate the hostname when fetching gems or making API request, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record with a domain that is suffixed with the original domain name, aka a "DNS hijack attack." NOTE: this vulnerability exists because to an incomplete fix for CVE-2015-3900.

The weakness was published 08/25/2015 (Website). The advisory is shared for download at trustwave.com. This vulnerability was named CVE-2015-4020 since 05/18/2015. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 84248 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350153 (Amazon Linux Security Advisory for ruby22: ALAS-2015-549).

Upgrading to version 2.0.17, 2.2.5 or 2.4.8 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (84248), SecurityFocus (BID 75431†) and Vulnerability Center (SBV-53990†). Similar entry is available at VDB-110973. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: 🔍

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: 84248
Nessus File: 🔍
Nessus Risk: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: ALAS-2015-549
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: RubyGems 2.0.17/2.2.5/2.4.8
Patch: github.com

Timelineinfo

05/18/2015 🔍
06/18/2015 +31 days 🔍
08/25/2015 +68 days 🔍
08/25/2015 +0 days 🔍
08/26/2015 +1 days 🔍
10/27/2015 +62 days 🔍
06/13/2022 +2421 days 🔍

Sourcesinfo

Product: github.com

Advisory: trustwave.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-4020 (🔍)
GCVE (CVE): GCVE-0-2015-4020
GCVE (VulDB): GCVE-100-77440
SecurityFocus: 75431
Vulnerability Center: 53990 - RubyGems Remote DNS Hijacking due to Improper Validation of Hostname Returned in the SRV Record, Medium

See also: 🔍

Entryinfo

Created: 08/26/2015 10:11
Updated: 06/13/2022 14:03
Changes: 08/26/2015 10:11 (55), 03/01/2018 10:21 (12), 06/13/2022 13:58 (3), 06/13/2022 14:03 (1)
Complete: 🔍
Cache ID: 216::103

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