CVE-2018-18435 : KioWare Server version 4.9.6 and older installs by default to "C:\kioware_com" with weak folder permissions granting any

KioWare Server version 4.9.6 and older installs by default to "C:\kioware_com" with weak folder permissions granting any user full permission "Everyone: (F)" to the contents of the directory and it's sub-folders. In addition, the program installs a service called "KWSService" which runs as "Localsystem", this will allow any user to escalate privileges to "NT AUTHORITY\SYSTEM" by substituting the service's binary with a malicious one.

Published 2019-03-21 16:00:28

Updated 2019-10-03 00:03:26

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2018-18435

Probability of exploitation activity in the next 30 days: 0.16%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 52 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2018-18435

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.2	HIGH	AV:L/AC:L/Au:N/C:C/I:C/A:C	3.9	10.0	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
7.8	HIGH	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2018-18435

CWE-732 Incorrect Permission Assignment for Critical Resource

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-18435

https://m.kioware.com/news/kioware-press-releases/kioware_server_security_patch_update

KioWare Server Security Patch Release
Patch;Vendor Advisory
https://www.kioware.com/patch.aspx

KioWare Security Patches
Patch;Vendor Advisory
https://www.exploit-db.com/exploits/46093/

KioWare Server Version 4.9.6 - Weak Folder Permissions Privilege Escalation
Exploit;Third Party Advisory;VDB Entry
http://packetstormsecurity.com/files/151031/KioWare-Server-4.9.6-Privilege-Escalation.html

KioWare Server 4.9.6 Privilege Escalation ≈ Packet Storm
Exploit;Third Party Advisory;VDB Entry
https://github.com/active-labs/Advisories/blob/master/2019/ACTIVE-2019-002.md

Advisories/ACTIVE-2019-002.md at master · active-labs/Advisories · GitHub

Products affected by CVE-2018-18435

Kioware » Kioware Server
Versions up to, including, (<=) 4.9.6
cpe:2.3:a:kioware:kioware_server:*:*:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2018-18435

Exploit prediction scoring system (EPSS) score for CVE-2018-18435

CVSS scores for CVE-2018-18435

CWE ids for CVE-2018-18435

References for CVE-2018-18435

Products affected by CVE-2018-18435