CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	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 Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.7	$0-$5k	0.00

A vulnerability was found in Ruby up to 2.3.7/2.4.4/2.5.1/2.6.0-preview2 (Programming Language Software). It has been rated as critical. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a 7pk security vulnerability (Taint). Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. It does not taint strings that result from unpacking tainted strings with some formats.

The bug was discovered 10/17/2018. The weakness was shared 11/16/2018 (Website). The advisory is shared for download at lists.debian.org. This vulnerability is handled as CVE-2018-16396 since 09/03/2018. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1211.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118247 (FreeBSD : ruby -- multiple vulnerabilities (afc60484-0652-440e-b01a-5ef814747f06)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176522 (Debian Security Update for ruby2.3 (DSA 4332-1)).

Upgrading to version 2.3.8, 2.4.5 or 2.6.0-preview3 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118247). The entries 114428, 114429, 114430 and 114431 are related to this item.

Productinfo

Type

• Programming Language Software

Name

• Ruby

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5
• 2.3.6
• 2.3.7
• 2.4.0
• 2.4.1
• 2.4.2
• 2.4.3
• 2.4.4
• 2.5.0
• 2.5.1
• 2.6.0-preview2

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

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

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Name: Taint
Class: 7pk security / Taint
CWE: CWE-254
ATT&CK: T1211

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 118247
Nessus Name: FreeBSD : ruby -- multiple vulnerabilities (afc60484-0652-440e-b01a-5ef814747f06)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Ruby 2.3.8/2.4.5/2.6.0-preview3

Timelineinfo

03/28/2018 🔍
09/03/2018 +159 days 🔍
10/17/2018 +44 days 🔍
10/20/2018 +3 days 🔍
10/22/2018 +2 days 🔍
11/16/2018 +25 days 🔍
11/16/2018 +0 days 🔍
11/17/2018 +1 days 🔍
06/06/2023 +1662 days 🔍

Sourcesinfo

Advisory: RHSA-2018:3729
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-16396 (🔍)
OVAL: 🔍

SecurityTracker: 1042106
SecurityFocus: 103686 - Ruby CVE-2018-6914 Directory Traversal Vulnerability

See also: 🔍

Entryinfo

Created: 11/17/2018 11:05
Updated: 06/06/2023 17:32
Changes: 11/17/2018 11:05 (76), 04/13/2020 17:04 (3), 06/06/2023 17:32 (5)
Complete: 🔍

Discussion

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