Nextcloud Server up to 13.x Access Check Password improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Nextcloud Server up to 13.x. Affected by this vulnerability is an unknown functionality of the component Access Check. The manipulation as part of Password leads to improper authentication. This vulnerability is uniquely identified as CVE-2018-16464. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Nextcloud Server up to 13.x (Cloud Software). This issue affects an unknown code of the component Access Check. The manipulation as part of a Password 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:

A missing access check in Nextcloud Server prior to 14.0.0 could lead to continued access to password protected link shares when the owner had changed the password.

The bug was discovered 10/25/2018. The weakness was disclosed 10/29/2018 (Website). The advisory is shared at hackerone.com. The identification of this vulnerability is CVE-2018-16464 since 09/04/2018. The attack may be initiated remotely. A simple authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

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 14.0.0 eliminates this vulnerability.

The entries VDB-126140, VDB-126139, VDB-126138 and VDB-126136 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.7
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: Improper authentication
CWE: 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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Server 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-2018-16464 (🔍)
GCVE (CVE): GCVE-0-2018-16464
GCVE (VulDB): GCVE-100-126137
See also: 🔍

Entryinfo

Created: 10/31/2018 05:48
Updated: 04/07/2020 17:38
Changes: 10/31/2018 05:48 (65), 04/07/2020 17:38 (1)
Complete: 🔍
Cache ID: 216::103

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

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