9.0
CRITICAL
CVE-2019-12739
Nextcloud ExtractionController RCE through Malformed RAR Filenames
Description

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).

INFO

Published Date :

June 5, 2019, 2:29 p.m.

Last Modified :

June 6, 2019, 11:29 p.m.

Remotely Exploitable :

Yes !

Impact Score :

6.0

Exploitability Score :

2.3
Affected Products

The following products are affected by CVE-2019-12739 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Nextcloud extract
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2019-12739.

URL Resource
https://hackerone.com/reports/546753 Exploit Third Party Advisory
https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-12739 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-12739 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Oct. 09, 2019

    Action Type Old Value New Value
    Added CVSS V3 MITRE AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
  • CVE Modified by [email protected]

    Jun. 06, 2019

    Action Type Old Value New Value
    Added Reference https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jun. 05, 2019

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:S/C:P/I:P/A:P)
    Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://hackerone.com/reports/546753 No Types Assigned https://hackerone.com/reports/546753 Exploit, Third Party Advisory
    Added CWE CWE-78
    Added CPE Configuration OR *cpe:2.3:a:nextcloud:extract:*:*:*:*:*:nextcloud:*:* versions up to (excluding) 1.2.0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-12739 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.09 }} 0.28%

score

0.82423

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability