VDB-123356 · CVE-2017-17762 · GCVE-0-2017-17762

EPiServer up to 7 Patch 4 DTD util/xmlrpc/Handler.ashx XML 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.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in EPiServer up to 7 Patch 4. This affects an unknown part of the file util/xmlrpc/Handler.ashx of the component DTD Handler. Such manipulation as part of XML Request leads to xml external entity reference. This vulnerability is documented as CVE-2017-17762. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in EPiServer up to 7 Patch 4. Affected by this issue is some unknown functionality of the file util/xmlrpc/Handler.ashx of the component DTD Handler. The manipulation as part of a XML Request leads to a xml external entity reference vulnerability. Using CWE to declare the problem leads to CWE-611. The product 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:

XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arbitrary files via a crafted DTD in an XML request involving util/xmlrpc/Handler.ashx.

The bug was discovered 08/29/2018. The weakness was released 08/29/2018 (Website). The advisory is shared for download at gist.github.com. This vulnerability is handled as CVE-2017-17762 since 12/18/2017. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

EPiServer

Version

7 Patch 4

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/18/2017 🔍
08/29/2018 +253 days 🔍
08/29/2018 +0 days 🔍
08/29/2018 +0 days 🔍
08/30/2018 +1 days 🔍
03/19/2020 +567 days 🔍

Sourcesinfo

Advisory: gist.github.com
Status: Not defined

CVE: CVE-2017-17762 (🔍)
GCVE (CVE): GCVE-0-2017-17762
GCVE (VulDB): GCVE-100-123356

Entryinfo

Created: 08/30/2018 06:49
Updated: 03/19/2020 08:24
Changes: 08/30/2018 06:49 (56), 03/19/2020 08:24 (1)
Complete: 🔍
Cache ID: 216::103