TigerVNC up to 1.10.x TLS Certificate rfb/CSecurityTLS.cxx improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in TigerVNC up to 1.10.x. Impacted is an unknown function of the file rfb/CSecurityTLS.cxx of the component TLS Certificate Handler. The manipulation leads to improper authentication. This vulnerability is referenced as CVE-2020-26117. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in TigerVNC up to 1.10.x. It has been rated as critical. This issue affects some unknown processing of the file rfb/CSecurityTLS.cxx of the component TLS Certificate Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.

The weakness was published 09/27/2020. The identification of this vulnerability is CVE-2020-26117 since 09/27/2020. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.11.0 eliminates this vulnerability.

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

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

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

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
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: TigerVNC 1.11.0

Timelineinfo

09/27/2020 🔍
09/27/2020 +0 days 🔍
09/27/2020 +0 days 🔍
11/14/2020 +48 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-26117 (🔍)
GCVE (CVE): GCVE-0-2020-26117
GCVE (VulDB): GCVE-100-162035

Entryinfo

Created: 09/27/2020 08:27
Updated: 11/14/2020 16:51
Changes: 09/27/2020 08:27 (37), 09/27/2020 08:32 (3), 11/13/2020 07:57 (3), 11/14/2020 16:51 (8)
Complete: 🔍
Cache ID: 216::103

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

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