VDB-111387 · CVE-2018-5218 · GCVE-0-2018-5218

K7 Antivirus 15.1.0306 Driver K7Sentry.sys 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.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in K7 Antivirus 15.1.0306 and classified as critical. Affected by this issue is some unknown functionality in the library K7Sentry.sys of the component Driver. Performing a manipulation results in input validation. This vulnerability is reported as CVE-2018-5218. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in K7 Antivirus 15.1.0306 (Anti-Malware Software). This affects an unknown part in the library K7Sentry.sys of the component Driver. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In K7 Antivirus 15.1.0306, the driver file (K7Sentry.sys) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values from IOCtl 0x950025b0.

The bug was discovered 01/04/2018. The weakness was disclosed 01/04/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2018-5218 since 01/04/2018. Attacking locally is a requirement. A authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/19/2019).

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

The entries VDB-111389, VDB-111388 and VDB-111386 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Anti-Malware Software

Vendor

Name

Antivirus

Version

15.1.0306

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.6
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/04/2018 🔍
01/04/2018 +0 days 🔍
01/04/2018 +0 days 🔍
01/04/2018 +0 days 🔍
01/05/2018 +1 days 🔍
12/19/2019 +713 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-5218 (🔍)
GCVE (CVE): GCVE-0-2018-5218
GCVE (VulDB): GCVE-100-111387
See also: 🔍

Entryinfo

Created: 01/05/2018 08:51
Updated: 12/19/2019 19:21
Changes: 01/05/2018 08:51 (59), 12/19/2019 19:21 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.