D-Link DIR-629-B1 /htdocs/cgibin weblogin_log REMOTE_ADDR memory corruption

Summaryinfo

A vulnerability marked as critical has been reported in D-Link DIR-629-B1. This affects the function weblogin_log of the file /htdocs/cgibin. The manipulation of the argument REMOTE_ADDR as part of Environment Variable leads to memory corruption. This vulnerability is listed as CVE-2018-10996. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in D-Link DIR-629-B1 (Router Operating System) (the affected version is unknown) and classified as critical. This issue affects the function weblogin_log of the file /htdocs/cgibin. The manipulation of the argument REMOTE_ADDR as part of a Environment Variable leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The weblogin_log function in /htdocs/cgibin on D-Link DIR-629-B1 devices allows attackers to execute arbitrary code or cause a denial of service (buffer overflow) via a session.cgi?ACTION=logout request involving a long REMOTE_ADDR environment variable.

The bug was discovered 05/11/2018. The weakness was presented 05/12/2018 (Website). The advisory is shared at securityfocus.com. The identification of this vulnerability is CVE-2018-10996 since 05/11/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/04/2020).

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

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 SecurityFocus (BID 104277†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-629-B1

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

• 🔍

CPE 2.2info

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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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