VDB-136029 · CVE-2019-12739 · GCVE-0-2019-12739

Extract Add-On up to 1.1.x on Nextcloud RAR Filename ExtractionController.php nameOfFile/directory os command injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Extract Add-On up to 1.1.x on Nextcloud. It has been classified as critical. This vulnerability affects unknown code in the library lib/Controller/ExtractionController.php of the component RAR Filename Handler. Performing a manipulation of the argument nameOfFile/directory results in os command injection. This vulnerability is cataloged as CVE-2019-12739. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Extract Add-On up to 1.1.x on Nextcloud. This affects an unknown code block in the library lib/Controller/ExtractionController.php of the component RAR Filename Handler. The manipulation of the argument nameOfFile/directory with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

lib/Controller/ExtractionController.php in the Extract add-on before 1.2.0 for Nextcloud allows Remote Code Execution via shell metacharacters in a RAR filename via ajax/extractRar.php (nameOfFile and directory parameters).

The weakness was shared 06/05/2019. This vulnerability is uniquely identified as CVE-2019-12739 since 06/05/2019. The exploitability is told to be easy. It is possible to initiate the attack remotely. The requirement for exploitation is a authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

By approaching the search of inurl:lib/Controller/ExtractionController.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.2.0 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Extract Add-On

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

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

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 9.0
CNA Vector (MITRE): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Extract Add-On 1.2.0

Timelineinfo

06/05/2019 🔍
06/05/2019 +0 days 🔍
06/06/2019 +1 days 🔍
09/28/2023 +1575 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Not defined

CVE: CVE-2019-12739 (🔍)
GCVE (CVE): GCVE-0-2019-12739
GCVE (VulDB): GCVE-100-136029

Entryinfo

Created: 06/06/2019 08:35
Updated: 09/28/2023 09:09
Changes: 06/06/2019 08:35 (39), 06/19/2020 21:21 (17), 09/28/2023 09:07 (4), 09/28/2023 09:09 (12)
Complete: 🔍
Cache ID: 216::103