QNAP QTS up to 4.2.6/4.3.3/4.3.4 memory corruption

Summaryinfo

A vulnerability categorized as critical has been discovered in QNAP QTS up to 4.2.6/4.3.3/4.3.4. The impacted element is an unknown function. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2018-0721. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

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. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Network Attached Storage Software

Vendor

• QNAP

Name

• QTS

Version

• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.2.4
• 4.2.5
• 4.2.6
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4

License

• commercial

Website

• Vendor: https://www.qnap.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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