Tenda AC7/AC9/AC10/AC15/AC18 Web Server mac memory corruption

Summaryinfo

A vulnerability has been found in Tenda AC7, AC9, AC10, AC15 and AC18 and classified as critical. The impacted element is an unknown function of the component Web Server. Performing a manipulation of the argument mac as part of POST Request results in memory corruption. This vulnerability is known as CVE-2018-18729. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in Tenda AC7, AC9, AC10, AC15 and AC18. This affects an unknown part of the component Web Server. The manipulation of the argument mac as part of a POST Request leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. There is a heap-based buffer overflow vulnerability in the router's web server -- httpd. While processing the 'mac' parameter for a post request, the value is directly used in a strcpy to a variable placed on the heap, which can leak sensitive information or even hijack program control flow.

The bug was discovered 10/25/2018. The weakness was published 10/28/2018 (Website). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2018-18729 since 10/27/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 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.

Similar entries are available at VDB-126048, VDB-126047 and VDB-126046. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Tenda

Name

• AC7
• AC9
• AC10
• AC15
• AC18

License

• commercial

Website

• Vendor: https://www.tenda.com.cn/

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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