Cybozu Office up to 10.4.0 File Download Reflected access control

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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.
3.5$0-$5k0.00

A vulnerability was found in Cybozu Office up to 10.4.0 (Office Suite Software). It has been classified as problematic. Affected is some unknown processing of the component File Download. The manipulation with an unknown input leads to a privilege escalation vulnerability (Reflected). CWE is classifying the issue as CWE-284. This is going to have an impact on integrity.

The bug was discovered 10/03/2016. The weakness was shared 04/17/2017 (Website). The advisory is shared for download at jvn.jp. This vulnerability is traded as CVE-2016-4874 since 05/17/2016. It is possible to launch the attack remotely. Required for exploitation is a authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 196 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 97719). The entries 99923, 99922, 99921 and 99920 are related to this item.

Productinfoedit

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CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.5
NVD Vector: 🔍

CVSSv2infoedit

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfoedit

Name: Reflected
Class: Privilege escalation / Reflected
CWE: CWE-284
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfoedit

05/17/2016 🔍
10/03/2016 +139 days 🔍
04/17/2017 +196 days 🔍
04/17/2017 +0 days 🔍
04/17/2017 +0 days 🔍
04/18/2017 +1 days 🔍
08/31/2020 +1231 days 🔍

Sourcesinfoedit

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

CVE: CVE-2016-4874 (🔍)
SecurityFocus: 97719 - Cybozu Office CVE-2016-4874 Arbitrary File Download Vulnerability
OSVDB: - CVE-2016-4874 - Cybozu - Office - Reflected File Download Issue

See also: 🔍

Entryinfoedit

Created: 04/18/2017 10:34 AM
Updated: 08/31/2020 04:39 PM
Changes: (4) vulnerability_discoverydate source_osvdb_title source_securityfocus_date source_securityfocus_class
Complete: 🔍

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