Nextcloud Server up to 12.0.10/13.0.5 Access Restriction access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Nextcloud Server up to 12.0.10/13.0.5. This affects an unknown part of the component Access Restriction. This manipulation causes access control. The identification of this vulnerability is CVE-2018-16466. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Nextcloud Server up to 12.0.10/13.0.5 (Cloud Software) and classified as critical. Affected by this vulnerability is some unknown processing of the component Access Restriction. 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 summary by CVE is:

Improper revalidation of permissions in Nextcloud Server prior to 14.0.0, 13.0.6 and 12.0.11 lead to not accepting access restrictions by acess tokens.

The bug was discovered 10/25/2018. The weakness was shared 10/29/2018 (Website). It is possible to read the advisory at hackerone.com. This vulnerability is known as CVE-2018-16466 since 09/04/2018. The exploitation appears to be easy. The attack can be launched remotely. Required for exploitation is a single authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 12.0.11, 13.0.6 or 14.0.0 eliminates this vulnerability.

The entries VDB-126140, VDB-126138, VDB-126137 and VDB-126136 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: 🔍

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: 🔍

Upgrade: Server 12.0.11/13.0.6/14.0.0

Timelineinfo

09/04/2018 🔍
10/25/2018 +51 days 🔍
10/29/2018 +4 days 🔍
10/30/2018 +0 days 🔍
10/31/2018 +1 days 🔍
04/07/2020 +524 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Not defined

CVE: CVE-2018-16466 (🔍)
GCVE (CVE): GCVE-0-2018-16466
GCVE (VulDB): GCVE-100-126139
See also: 🔍

Entryinfo

Created: 10/31/2018 05:49
Updated: 04/07/2020 17:29
Changes: 10/31/2018 05:49 (63), 04/07/2020 17:29 (1)
Complete: 🔍
Cache ID: 216::103

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

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