VDB-100355 · CVE-2016-4844 · BID 92462

Cybozu Mailwise up to 5.3.x information disclosure

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.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Cybozu Mailwise up to 5.3.x and classified as problematic. This affects an unknown part. The manipulation leads to information disclosure. This vulnerability is referenced as CVE-2016-4844. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cybozu Mailwise up to 5.3.x and classified as critical. This issue affects an unknown part. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Cybozu Mailwise before 5.4.0 allows remote attackers to conduct clickjacking attacks.

The bug was discovered 08/16/2016. The weakness was published 04/20/2017 (Website). It is possible to read the advisory at jvn.jp. The identification of this vulnerability is CVE-2016-4844 since 05/17/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 247 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 5.4.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 92462†). Similar entries are available at VDB-100354 and VDB-100353. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Cybozu

Name

Mailwise

Version

License

commercial

Website

Vendor: https://cybozu-global.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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

OpenVAS ID: 801056
OpenVAS Name: Cybozu Mailwise Multiple Vulnerabilities Aug-2016
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mailwise 5.4.0

Timelineinfo

05/17/2016 🔍
08/16/2016 +91 days 🔍
08/16/2016 +0 days 🔍
04/20/2017 +247 days 🔍
04/20/2017 +0 days 🔍
04/21/2017 +1 days 🔍
04/21/2017 +0 days 🔍

Sourcesinfo

Vendor: cybozu-global.com

Advisory: jvn.jp
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4844 (🔍)
GCVE (CVE): GCVE-0-2016-4844
GCVE (VulDB): GCVE-100-100355
SecurityFocus: 92462 - Cybozu Mailwise CVE-2016-4844 Clickjacking Vulnerability
OSVDB: - CVE-2016-4844 - Cybozu - Mailwise - Clickjacking Issue

See also: 🔍

Entryinfo

Created: 04/21/2017 09:49
Changes: 04/21/2017 09:49 (70)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.