VDB-127156 · CVE-2018-0721 · Qualys 13356

QNAP QTS up to 4.2.6/4.3.3/4.3.4 memory corruption

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.
8.3$0-$5k0.00

A vulnerability has been found in QNAP QTS up to 4.2.6/4.3.3/4.3.4 (Network Attached Storage Software) and classified as critical. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Buffer Overflow vulnerability in QNAP QTS 4.2.6 build 20180711 and earlier versions, 4.3.3 build 20180725 and earlier versions, and 4.3.4 build 20180710 and earlier versions could allow remote attackers to run arbitrary code on NAS devices.

The bug was discovered 09/20/2018. The weakness was released 11/27/2018 (Website). The advisory is shared for download at qnap.com. This vulnerability was named CVE-2018-0721 since 11/28/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 68 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13356 (QNAP QTS Multiple Vulnerabilties (NAS-201809-20)).

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

Entry connected to this vulnerability is available at VDB-127155.

Productinfo

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Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 7.7
CNA Vector (QNAP Systems, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/28/2017 🔍
09/20/2018 +296 days 🔍
11/27/2018 +68 days 🔍
11/27/2018 +0 days 🔍
11/28/2018 +1 days 🔍
06/11/2023 +1656 days 🔍

Sourcesinfo

Vendor: qnap.com

Advisory: qnap.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0721 (🔍)
See also: 🔍

Entryinfo

Created: 11/28/2018 07:42 AM
Updated: 06/11/2023 02:44 PM
Changes: 11/28/2018 07:42 AM (62), 04/15/2020 09:33 AM (2), 06/11/2023 02:44 PM (14)
Complete: 🔍
Cache ID: 18:B43:40

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