Nextcloud Server up to 11.0.6/12.0.4 Authorization permission

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 was found in Nextcloud Server up to 11.0.6/12.0.4. It has been classified as critical. The impacted element is an unknown function of the component Authorization. Performing a manipulation results in permission. This vulnerability is known as CVE-2017-0936. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Nextcloud Server up to 11.0.6/12.0.4 (Cloud Software). This affects an unknown code block of the component Authorization. The manipulation with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Nextcloud Server before 11.0.7 and 12.0.5 suffers from an Authorization Bypass Through User-Controlled Key vulnerability. A missing ownership check allowed logged-in users to change the scope of app passwords of other users. Note that the app passwords themselves where neither disclosed nor could the error be misused to identify as another user.

The bug was discovered 02/07/2018. The weakness was published 03/28/2018 (Website). It is possible to read the advisory at nextcloud.com. This vulnerability is uniquely identified as CVE-2017-0936 since 11/30/2016. It is possible to initiate the attack remotely. The requirement for exploitation is a authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1222 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 49 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109239 (openSUSE Security Update : nextcloud (openSUSE-2018-384)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171096 (OpenSUSE Security Update for nextcloud (openSUSE-SU-2018:1040-1)).

Upgrading to version 11.0.7 or 12.0.5 eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (109239). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

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: Permission
CWE: CWE-275 / 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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Nessus ID: 109239
Nessus Name: openSUSE Security Update : nextcloud (openSUSE-2018-384)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 56280
OpenVAS Name: Nextcloud Server Authorization Bypass Vulnerability May18 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Nextcloud Server 11.0.7/12.0.5

Timelineinfo

11/30/2016 🔍
02/07/2018 +434 days 🔍
03/28/2018 +49 days 🔍
03/28/2018 +0 days 🔍
03/29/2018 +1 days 🔍
04/20/2018 +22 days 🔍
04/23/2018 +3 days 🔍
01/17/2020 +634 days 🔍

Sourcesinfo

Advisory: nextcloud.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-0936 (🔍)
GCVE (CVE): GCVE-0-2017-0936
GCVE (VulDB): GCVE-100-115155

Entryinfo

Created: 03/29/2018 09:15
Updated: 01/17/2020 15:57
Changes: 03/29/2018 09:15 (73), 01/17/2020 15:57 (3)
Complete: 🔍
Cache ID: 216::103

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

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