Nextcloud Server 16.0.1 Share permissions

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Nextcloud Server 16.0.1. The impacted element is an unknown function of the component Share Handler. Executing a manipulation can lead to permissions. This vulnerability is tracked as CVE-2019-15621. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Nextcloud Server 16.0.1 (Cloud Software). This vulnerability affects some unknown functionality of the component Share Handler. The manipulation with an unknown input leads to a permissions vulnerability. The CWE definition for the vulnerability is CWE-281. The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions when sharing the mount point of a share they received, as a public link.

The weakness was disclosed 02/04/2020. This vulnerability was named CVE-2019-15621 since 08/26/2019. The exploitation appears to be easy. The attack can be initiated remotely. A single authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

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

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: Permissions
CWE: CWE-281 / 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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/26/2019 🔍
02/04/2020 +162 days 🔍
02/05/2020 +1 days 🔍
03/28/2024 +1513 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Not defined

CVE: CVE-2019-15621 (🔍)
GCVE (CVE): GCVE-0-2019-15621
GCVE (VulDB): GCVE-100-149662
See also: 🔍

Entryinfo

Created: 02/05/2020 10:55
Updated: 03/28/2024 09:32
Changes: 02/05/2020 10:55 (35), 02/05/2020 11:00 (18), 03/28/2024 09:32 (17)
Complete: 🔍
Cache ID: 216::103

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