6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
31.3%
EpubCheck 4.0.1 is vulnerable to external XML entity processing attacks.
EpubCheck is a tool to validate that EPUB files follow the proper format. It can be used as a stand alone command line utility, or included in a project (most commonly being epub readers) as a library.
CWE-611: Improper Restriction of XML External Entity Reference (‘XXE’) - CVE-2016-9487
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.
A remote attacker may be able to access arbitrary files on a system, or cause the system execute arbitrary requests.
Apply an update
EpubCheck has released version 4.0.2 to address the vulnerability.
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Updated: December 13, 2016
Affected
We have not received a statement from the vendor.
Adobe has released an update for affected products.
Updated: December 14, 2016
Affected
We have not received a statement from the vendor.
Apple has released updates to address affected products.
Notified: October 13, 2016 Updated: December 09, 2016
Affected
We have not received a statement from the vendor.
We are not aware of further vendor information regarding this vulnerability.
Group | Score | Vector |
---|---|---|
Base | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Temporal | 5.9 | E:–/RL:OF/RC:C |
Environmental | 4.5 | CDP:N/TD:M/CR:ND/IR:ND/AR:ND |
Thanks to Craig Arendt for reporting this vulnerability.
This document was written by Trent Novelly.
CVE IDs: | CVE-2016-9487 |
---|---|
Date Public: | 2016-12-13 Date First Published: |
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
31.3%