D-Link DIR-825 2.10b02 HTTP Request /vct_wan strchr memory corruption

Summaryinfo

A vulnerability classified as critical was found in D-Link DIR-825 2.10b02. Affected by this issue is the function strchr of the file /vct_wan of the component HTTP Request Handler. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2021-29296. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in D-Link DIR-825 2.10b02 (Router Operating System) and classified as critical. This vulnerability affects the function strchr of the file /vct_wan of the component HTTP Request Handler. 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 availability. CVE summarizes:

Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched

The weakness was shared 08/11/2021 as SAP10212. The advisory is shared for download at supportannouncement.us.dlink.com. This vulnerability was named CVE-2021-29296. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/05/2024).

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

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Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-825

Version

• 2.10b02

License

• commercial

Website

• Vendor: https://www.dlink.com/

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