VDB-112919 · CVE-2018-6791 · Qualys 170849

KDE Plasma Workspace up to 5.12.0 vfat deviceserviceaction.cpp 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.
5.4	$0-$5k	0.00

A vulnerability was found in KDE Plasma Workspace up to 5.12.0 and classified as critical. This issue affects some unknown functionality of the file soliduiserver/deviceserviceaction.cpp of the component vfat Handler. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in soliduiserver/deviceserviceaction.cpp in KDE Plasma Workspace before 5.12.0. When a vfat thumbdrive that contains `` or $() in its volume label is plugged in and mounted through the device notifier, it's interpreted as a shell command, leading to a possibility of arbitrary command execution. An example of an offending volume label is "$(touch b)" -- this will create a file called b in the home folder.

The bug was discovered 02/03/2018. The weakness was shared 02/07/2018 (Website). It is possible to read the advisory at bugs.kde.org. The identification of this vulnerability is CVE-2018-6791 since 02/06/2018. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106784 (Fedora 27 : plasma-workspace (2018-fa58e0c507)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170849 (OpenSUSE Security Update for plasma5-workspace (openSUSE-SU-2018:0397-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106784). The entry 112918 is related to this item.

Productinfo

Vendor

Name

Plasma Workspace

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 106784
Nessus Name: Fedora 27 : plasma-workspace (2018-fa58e0c507)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 861332
OpenVAS Name: SuSE Update for plasma5-workspace openSUSE-SU-2018:0397-1 (plasma5-workspace)
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: 🔍

Patch: cgit.kde.org

Timelineinfo

02/03/2018 🔍
02/06/2018 +3 days 🔍
02/06/2018 +0 days 🔍
02/07/2018 +1 days 🔍
02/07/2018 +0 days 🔍
02/12/2018 +5 days 🔍
02/13/2018 +1 days 🔍
02/03/2023 +1816 days 🔍

Sourcesinfo

Vendor: kde.org

Advisory: FEDORA-2018-fa58e0c507
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-6791 (🔍)
OVAL: 🔍
See also: 🔍

Entryinfo

Created: 02/07/2018 08:36
Updated: 02/03/2023 18:07
Changes: 02/07/2018 08:36 (74), 01/02/2020 11:12 (4), 02/03/2023 18:00 (4), 02/03/2023 18:07 (1)
Complete: 🔍