VDB-112433 · CVE-2018-6217 · GCVE-0-2018-6217

Kingsoft WPS Office 10.1.0.7106/10.2.0.5978 kso.dll WStr::_alloc_iostr_data input validation

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.
4.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Kingsoft WPS Office 10.1.0.7106/10.2.0.5978. This affects the function WStr::_alloc_iostr_data in the library kso.dll. The manipulation leads to input validation. This vulnerability is listed as CVE-2018-6217. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Kingsoft WPS Office 10.1.0.7106/10.2.0.5978 (Office Suite Software) and classified as problematic. This issue affects the function WStr::_alloc_iostr_data in the library kso.dll. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

The WStr::_alloc_iostr_data() function in kso.dll in Kingsoft WPS Office 10.1.0.7106 and 10.2.0.5978 allows remote attackers to cause a denial of service (application crash) via a crafted (a) web page, (b) office document, or (c) .rtf file.

The bug was discovered 01/23/2018. The weakness was presented 01/25/2018 (Website). The advisory is shared at github.com. The identification of this vulnerability is CVE-2018-6217 since 01/25/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Office Suite Software

Vendor

Kingsoft

Name

WPS Office

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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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: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/23/2018 🔍
01/25/2018 +2 days 🔍
01/25/2018 +0 days 🔍
01/25/2018 +0 days 🔍
01/25/2018 +0 days 🔍
12/27/2019 +701 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-6217 (🔍)
GCVE (CVE): GCVE-0-2018-6217
GCVE (VulDB): GCVE-100-112433

Entryinfo

Created: 01/25/2018 15:02
Updated: 12/27/2019 15:57
Changes: 01/25/2018 15:02 (58), 12/27/2019 15:57 (1)
Complete: 🔍
Cache ID: 216::103