VDB-100353 · CVE-2016-4842 · BID 92460

Cybozu Mailwise up to 5.3.x Email Read 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 (≈)
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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.
4.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cybozu Mailwise up to 5.3.x. Affected by this vulnerability is an unknown functionality of the component Email Read Handler. Performing a manipulation results in information disclosure. This vulnerability was named CVE-2016-4842. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cybozu Mailwise up to 5.3.x. This affects an unknown functionality of the component Email Read Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.

The bug was discovered 08/16/2016. The weakness was presented 04/20/2017 by Masato Kinugawa (Website). The advisory is shared at jvn.jp. This vulnerability is uniquely identified as CVE-2016-4842 since 05/17/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

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 92460†). See VDB-100355 and VDB-100354 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
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: 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: 🔍

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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 🔍
09/18/2020 +1246 days 🔍

Sourcesinfo

Vendor: cybozu-global.com

Advisory: jvn.jp
Researcher: Masato Kinugawa
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4842 (🔍)
GCVE (CVE): GCVE-0-2016-4842
GCVE (VulDB): GCVE-100-100353
SecurityFocus: 92460 - Cybozu Mailwise CVE-2016-4842 Information Disclosure Vulnerability
OSVDB: - CVE-2016-4842 - Cybozu - Mailwise - Information Disclosure Issue

See also: 🔍

Entryinfo

Created: 04/21/2017 09:48
Updated: 09/18/2020 17:48
Changes: 04/21/2017 09:48 (69), 09/18/2020 17:48 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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