NextCloud Mail 1.1.3 TLS Host certificate validation

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
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6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in NextCloud Mail 1.1.3. This impacts an unknown function of the component TLS Host Handler. This manipulation causes certificate validation. This vulnerability is registered as CVE-2020-8156. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in NextCloud Mail 1.1.3 (Cloud Software) and classified as critical. Affected by this vulnerability is an unknown functionality of the component TLS Host Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.

The weakness was published 05/12/2020. This vulnerability is known as CVE-2020-8156 since 01/28/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1587.003 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.6
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
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: Certificate validation
CWE: CWE-295 / CWE-287
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/28/2020 🔍
05/12/2020 +105 days 🔍
05/13/2020 +1 days 🔍
11/20/2024 +1652 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-8156 (🔍)
GCVE (CVE): GCVE-0-2020-8156
GCVE (VulDB): GCVE-100-155065

Entryinfo

Created: 05/13/2020 07:48
Updated: 11/20/2024 17:09
Changes: 05/13/2020 07:48 (35), 05/13/2020 07:53 (18), 11/20/2024 17:09 (16)
Complete: 🔍
Cache ID: 216::103

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

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