VDB-122786 · CVE-2018-3776 · Qualys 13235

Nextcloud Server up to 11.0.4/12.0.2 Input Validator Log log file

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Nextcloud Server up to 11.0.4/12.0.2. It has been declared as problematic. This issue affects some unknown processing of the component Input Validator. Such manipulation leads to log file (Log). This vulnerability is documented as CVE-2018-3776. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Nextcloud Server up to 11.0.4/12.0.2 (Cloud Software). It has been rated as problematic. Affected by this issue is some unknown processing of the component Input Validator. The manipulation with an unknown input leads to a log file vulnerability (Log). Using CWE to declare the problem leads to CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. Impacted is availability. CVE summarizes:

Improper input validator in Nextcloud Server prior to 12.0.3 and 11.0.5 could lead to an attacker's actions not being logged in the audit log.

The bug was discovered 08/03/2018. The weakness was released 08/12/2018 (Website). The advisory is available at nextcloud.com. This vulnerability is handled as CVE-2018-3776 since 12/27/2017. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13235 (Nextcloud Server Improper validation of data passed to JSON encoder (NC-SA-2018-006)).

Upgrading to version 11.0.5 or 12.0.3 eliminates this vulnerability.

Entry connected to this vulnerability is available at VDB-122785. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
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

Name: Log
Class: Log file / Log
CWE: CWE-532 / CWE-200 / CWE-284
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nextcloud Server 11.0.5/12.0.3

Timelineinfo

12/27/2017 🔍
08/03/2018 +218 days 🔍
08/12/2018 +8 days 🔍
08/12/2018 +0 days 🔍
08/13/2018 +1 days 🔍
03/15/2020 +580 days 🔍

Sourcesinfo

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

CVE: CVE-2018-3776 (🔍)
GCVE (CVE): GCVE-0-2018-3776
GCVE (VulDB): GCVE-100-122786
See also: 🔍

Entryinfo

Created: 08/13/2018 07:59
Updated: 03/15/2020 08:27
Changes: 08/13/2018 07:59 (66), 03/15/2020 08:27 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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