VDB-110731 · CVE-2017-17701 · GCVE-0-2017-17701

K7 Antivirus 15.1.0309 K7Sentry.sys null pointer dereference

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.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in K7 Antivirus 15.1.0309. It has been classified as problematic. Impacted is an unknown function in the library K7Sentry.sys. This manipulation causes null pointer dereference. This vulnerability is handled as CVE-2017-17701. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in K7 Antivirus 15.1.0309 (Anti-Malware Software) and classified as problematic. Affected by this vulnerability is an unknown code block in the library K7Sentry.sys. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

K7Sentry.sys 15.1.0.59 in K7 Antivirus 15.1.0309 has a NULL pointer dereference via a 0x950025c8 DeviceIoControl request.

The bug was discovered 12/14/2017. The weakness was released 12/15/2017 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2017-17701 since 12/15/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 12/15/2019).

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

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

Entries connected to this vulnerability are available at VDB-110730 and VDB-110729. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Anti-Malware Software

Vendor

Name

Antivirus

Version

15.1.0309

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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

12/14/2017 🔍
12/15/2017 +1 days 🔍
12/15/2017 +0 days 🔍
12/15/2017 +0 days 🔍
12/16/2017 +1 days 🔍
12/15/2019 +729 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2017-17701 (🔍)
GCVE (CVE): GCVE-0-2017-17701
GCVE (VulDB): GCVE-100-110731
See also: 🔍

Entryinfo

Created: 12/16/2017 16:29
Updated: 12/15/2019 15:35
Changes: 12/16/2017 16:29 (58), 12/15/2019 15:35 (1)
Complete: 🔍
Cache ID: 216:DC3:103

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