DrayTek Vigor310 up to 4.3.2.6 ft_payload_dns length heap-based overflow

Summaryinfo

A vulnerability was found in DrayTek Vigor310 up to 4.3.2.6. It has been rated as critical. The affected element is the function ft_payload_dns. Performing a manipulation of the argument length results in heap-based overflow. This vulnerability was named CVE-2024-41593. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in DrayTek Vigor310 up to 4.3.2.6. This affects the function ft_payload_dns. The manipulation of the argument length with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

DrayTek Vigor310 devices through 4.3.2.6 allow a remote attacker to execute arbitrary code via the function ft_payload_dns(), because a byte sign-extension operation occurs for the length argument of a _memcpy call, leading to a heap-based Buffer Overflow.

The advisory is shared at forescout.com. This vulnerability is uniquely identified as CVE-2024-41593 since 07/18/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/15/2025).

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2024-39090). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• DrayTek

Name

• Vigor310

Version

• 4.3.2.0
• 4.3.2.1
• 4.3.2.2
• 4.3.2.3
• 4.3.2.4
• 4.3.2.5
• 4.3.2.6

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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