D-Link DSL-3782 EU 1.01 Diagnostics /userfs/bin/tcapi Commit memory corruption

Summaryinfo

A vulnerability was found in D-Link DSL-3782 EU 1.01. It has been classified as critical. This affects an unknown function of the file /userfs/bin/tcapi of the component Diagnostics. This manipulation of the argument Commit as part of Parameter causes memory corruption. This vulnerability is tracked as CVE-2018-10749. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in D-Link DSL-3782 EU 1.01. It has been declared as critical. Affected by this vulnerability is an unknown code block of the file /userfs/bin/tcapi of the component Diagnostics. The manipulation of the argument commit as part of a Parameter 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. The summary by CVE is:

An issue was discovered on D-Link DSL-3782 EU 1.01 devices. An authenticated user can pass a long buffer as a 'commit' parameter to the '/userfs/bin/tcapi' binary (in the Diagnostics component) using the 'commit <node_name>' function and cause memory corruption. Furthermore, it is possible to redirect the flow of the program and execute arbitrary code.

The bug was discovered 05/04/2018. The weakness was disclosed 05/04/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-10749 since 05/04/2018. The exploitation appears to be easy. The attack can be launched remotely. The requirement for exploitation is a single authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/02/2020).

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

The entries VDB-117368, VDB-117366, VDB-117365 and VDB-117364 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• D-Link

Name

• DSL-3782

Version

• EU 1.01

License

• commercial

Website

• Vendor: https://www.dlink.com/

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