BigBlueButton Greenlight up to 2.5.5 HTTP Header privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in BigBlueButton Greenlight up to 2.5.5. It has been declared as critical. Affected by this vulnerability is an unknown functionality. Such manipulation as part of HTTP Header leads to privileges management. This vulnerability is referenced as CVE-2020-26163. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in BigBlueButton Greenlight up to 2.5.5 and classified as critical. Affected by this issue is some unknown processing. The manipulation as part of a HTTP Header leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

BigBlueButton Greenlight before 2.5.6 allows HTTP header (Host and Origin) attacks, which can result in Account Takeover if a victim follows a spoofed password-reset link.

The weakness was published 09/30/2020. This vulnerability is handled as CVE-2020-26163 since 09/30/2020. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 2.5.6 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
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: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: 🔍

Upgrade: BigBlueButton Greenlight 2.5.6

Timelineinfo

09/30/2020 🔍
09/30/2020 +0 days 🔍
10/01/2020 +1 days 🔍
11/15/2020 +45 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-26163 (🔍)
GCVE (CVE): GCVE-0-2020-26163
GCVE (VulDB): GCVE-100-162140

Entryinfo

Created: 10/01/2020 09:57
Updated: 11/15/2020 10:49
Changes: 10/01/2020 09:57 (35), 10/01/2020 10:02 (3), 11/14/2020 09:34 (5), 11/15/2020 10:49 (14)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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