VDB-102163 · CVE-2016-4908 · BID 94966

Cybozu Garoon up to 3.x/4.2.2 RSS Settings access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Cybozu Garoon up to 3.x/4.2.2. It has been classified as problematic. The affected element is an unknown function of the component RSS Settings Handler. This manipulation causes access control. This vulnerability appears as CVE-2016-4908. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in Cybozu Garoon up to 3.x/4.2.2 (Groupware Software) and classified as critical. Affected by this vulnerability is an unknown code block of the component RSS Settings Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Cybozu Garoon 3.0.0 to 4.2.2 allows remote authenticated attackers to bypass access restriction to alter or delete another user's private RSS settings via unspecified vectors.

The bug was discovered 12/19/2016. The weakness was presented 06/09/2017 with Cybozu, Inc. (Website). It is possible to read the advisory at jvn.jp. This vulnerability is known as CVE-2016-4908 since 05/17/2016. The exploitation appears to be easy. The attack can be launched remotely. The requirement for exploitation is a single authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 172 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 94966†). See VDB-102165 and VDB-102166 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
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: Access control
CWE: 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 Garoon Multiple Vulnerabilities - Oct16
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/17/2016 🔍
12/19/2016 +216 days 🔍
12/20/2016 +1 days 🔍
06/09/2017 +171 days 🔍
06/09/2017 +0 days 🔍
06/10/2017 +1 days 🔍
12/26/2020 +1295 days 🔍

Sourcesinfo

Vendor: cybozu-global.com

Advisory: jvn.jp
Researcher: Cybozu, Inc.
Organization: Cybozu, Inc.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4908 (🔍)
GCVE (CVE): GCVE-0-2016-4908
GCVE (VulDB): GCVE-100-102163
SecurityFocus: 94966 - Cybozu Garoon Multiple Access Bypass Vulnerabilities

See also: 🔍

Entryinfo

Created: 06/10/2017 08:47
Updated: 12/26/2020 17:58
Changes: 06/10/2017 08:47 (66), 10/15/2019 16:24 (4), 12/26/2020 17:58 (2)
Complete: 🔍
Cache ID: 216::103

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

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