VDB-98976 · CVE-2016-9464 · BID 97287

Nextcloud Server up to 9.0.53/10.0.0 improper authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Nextcloud Server up to 9.0.53/10.0.0. This impacts an unknown function. The manipulation results in improper authorization. This vulnerability is identified as CVE-2016-9464. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Nextcloud Server up to 9.0.53/10.0.0 (Cloud Software). Affected is an unknown part. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity, and availability. CVE summarizes:

Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.

The bug was discovered 10/10/2016. The weakness was released 03/28/2017 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2016-9464 since 11/19/2016. It is possible to launch the attack remotely. A authentication is necessary for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1548.002.

The vulnerability was handled as a non-public zero-day exploit for at least 168 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 9.0.54 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 97287†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.4
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
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 authorization
CWE: CWE-285 / 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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OpenVAS ID: 801810
OpenVAS Name: Nextcloud Authorization Check Vulnerability (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nextcloud Server 9.0.54
Patch: github.com

Timelineinfo

10/10/2016 🔍
11/19/2016 +40 days 🔍
03/27/2017 +128 days 🔍
03/27/2017 +0 days 🔍
03/28/2017 +1 days 🔍
03/28/2017 +0 days 🔍
11/22/2022 +2065 days 🔍

Sourcesinfo

Advisory: 3387e5d00fcf6b2ea6b285a091e5743f545e7202
Status: Not defined

CVE: CVE-2016-9464 (🔍)
GCVE (CVE): GCVE-0-2016-9464
GCVE (VulDB): GCVE-100-98976
SecurityFocus: 97287 - Nextcloud CVE-2016-9464 Unauthorized Access Vulnerability
OSVDB: - CVE-2016-9464 - Nextcloud Server - Improper Authorization Issue

Entryinfo

Created: 03/28/2017 22:15
Updated: 11/22/2022 16:44
Changes: 03/28/2017 22:15 (63), 09/14/2020 20:56 (4), 11/22/2022 16:44 (5)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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