Sanitize Gem on Ruby Whitelist input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Sanitize Gem on Ruby and classified as critical. The impacted element is an unknown function of the component Whitelist. The manipulation leads to input validation. This vulnerability is referenced as CVE-2018-3740. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Sanitize Gem on Ruby (Ruby Gem) (the affected version unknown). This issue affects an unknown part of the component Whitelist. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A specially crafted HTML fragment can cause Sanitize gem for Ruby to allow non-whitelisted attributes to be used on a whitelisted HTML element.

The bug was discovered 03/19/2018. The weakness was published 03/30/2018 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2018-3740 since 12/28/2017. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 110699 (FreeBSD : Gitlab -- multiple vulnerabilities (b950a83b-789e-11e8-8545-d8cb8abf62dd)), 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 176554 (Debian Security Update for ruby-sanitize (DSA 4358-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (110699). Similar entries are available at VDB-122574, VDB-122575 and VDB-122576. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
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: 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: 110699
Nessus Name: FreeBSD : Gitlab -- multiple vulnerabilities (b950a83b-789e-11e8-8545-d8cb8abf62dd)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: github.com

Timelineinfo

12/28/2017 🔍
03/19/2018 +81 days 🔍
03/30/2018 +11 days 🔍
03/30/2018 +0 days 🔍
03/31/2018 +1 days 🔍
06/25/2018 +86 days 🔍
06/27/2018 +2 days 🔍
02/24/2023 +1703 days 🔍

Sourcesinfo

Advisory: 01629a162e448a83d901456d0ba8b65f3b03d46e
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-3740 (🔍)
GCVE (CVE): GCVE-0-2018-3740
GCVE (VulDB): GCVE-100-115265

OVAL: 🔍
See also: 🔍

Entryinfo

Created: 03/31/2018 10:12
Updated: 02/24/2023 16:47
Changes: 03/31/2018 10:12 (68), 01/18/2020 13:41 (8), 02/24/2023 16:47 (5)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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