Cybozu Office up to 10.8.4 Custom App access control

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.
4.7$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Cybozu Office up to 10.8.4. Impacted is an unknown function of the component Custom App. This manipulation causes access control. This vulnerability is registered as CVE-2021-20634. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cybozu Office up to 10.8.4 (Office Suite Software). It has been declared as critical. Affected by this vulnerability is an unknown code of the component Custom App. 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 weakness was published 03/18/2021. The advisory is shared at jvn.jp. This vulnerability is known as CVE-2021-20634. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading eliminates this vulnerability.

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

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2020 🔍
03/18/2021 +91 days 🔍
03/18/2021 +0 days 🔍
04/02/2021 +15 days 🔍

Sourcesinfo

Vendor: cybozu-global.com

Advisory: jvn.jp
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-20634 (🔍)
GCVE (CVE): GCVE-0-2021-20634
GCVE (VulDB): GCVE-100-171385

Entryinfo

Created: 03/18/2021 07:44
Updated: 04/02/2021 12:35
Changes: 03/18/2021 07:44 (39), 04/02/2021 12:29 (5), 04/02/2021 12:35 (18)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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