Restlet Framework up to 2.3.11 REST API HTTP Request xml external entity reference

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.
7.1$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Restlet Framework up to 2.3.11. Affected by this issue is an unknown code block of the component REST API HTTP Request Handler. The manipulation with an unknown input leads to a xml external entity vulnerability. Using CWE to declare the problem leads to CWE-611. The software processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Restlet Framework before 2.3.12 allows remote attackers to access arbitrary files via a crafted REST API HTTP request that conducts an XXE attack, because only general external entities (not parameter external entities) are properly considered. This is related to XmlRepresentation, DOMRepresentation, SaxRepresentation, and JacksonRepresentation.

The bug was discovered 10/02/2017. The weakness was presented 11/30/2017 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2017-14949 since 09/29/2017. The exploitation is known to be easy. 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 vulnerability was handled as a non-public zero-day exploit for at least 59 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.3.12 eliminates this vulnerability.

See 71848 for similar entry.

Productinfoedit

Vendor

Name

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2infoedit

AVACAuCIA
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfoedit

Class: XML External Entity
CWE: CWE-611
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Threat Intelligenceinfoedit

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

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Framework 2.3.12

Timelineinfoedit

09/29/2017 🔍
10/02/2017 +3 days 🔍
11/30/2017 +59 days 🔍
11/30/2017 +0 days 🔍
12/01/2017 +1 days 🔍
12/11/2019 +740 days 🔍

Sourcesinfoedit

Advisory: github.com
Status: Not defined

CVE: CVE-2017-14949 (🔍)
See also: 🔍

Entryinfoedit

Created: 12/01/2017 08:08 AM
Updated: 12/11/2019 03:40 PM
Changes: (1) vulnerability_discoverydate
Complete: 🔍

Comments

No comments yet. Languages: en.

Please log in to comment.

Do you know our Splunk app?

Download it now for free!