EpubCheck 4.0.1 XML Data EPUB File xml external entity reference

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in EpubCheck 4.0.1. It has been declared as critical. Impacted is an unknown function of the component XML Data Handler. Executing a manipulation as part of EPUB File can lead to xml external entity reference. This vulnerability is handled as CVE-2016-9487. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in EpubCheck 4.0.1. This vulnerability affects some unknown processing of the component XML Data Handler. The manipulation as part of a EPUB File leads to a xml external entity reference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

EpubCheck 4.0.1 does not properly restrict resolving external entities when parsing XML in EPUB files during validation. An attacker who supplies a specially crafted EPUB file may be able to exploit this behavior to read arbitrary files, or have the victim execute arbitrary requests on his behalf, abusing the victim's trust relationship with other entities.

The bug was discovered 12/13/2016. The weakness was released 07/13/2018 by Craig Arendt as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2016-9487 since 11/21/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 577 days. During that time the estimated underground price was around $0-$5k.

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94864†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/21/2016 🔍
12/13/2016 +22 days 🔍
12/13/2016 +0 days 🔍
07/13/2018 +576 days 🔍
07/13/2018 +0 days 🔍
07/14/2018 +1 days 🔍
12/27/2024 +2358 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Researcher: Craig Arendt
Status: Confirmed

CVE: CVE-2016-9487 (🔍)
GCVE (CVE): GCVE-0-2016-9487
GCVE (VulDB): GCVE-100-121456
CERT: 🔍
SecurityFocus: 94864 - EpubCheck CVE-2016-9487 XML External Entity Injection Vulnerability

Entryinfo

Created: 07/14/2018 17:03
Updated: 12/27/2024 08:29
Changes: 07/14/2018 17:03 (59), 03/05/2020 08:18 (4), 12/27/2024 08:29 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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