TP-LINK TL-R600VPN HTTP Server HTTP Request memory corruption

Summaryinfo

A vulnerability identified as critical has been detected in TP-LINK TL-R600VPN. This impacts an unknown function of the component HTTP Server. The manipulation as part of HTTP Request leads to memory corruption. This vulnerability is uniquely identified as CVE-2018-3950. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in TP-LINK TL-R600VPN (Router Operating System) (affected version not known). It has been rated as critical. This issue affects some unknown functionality of the component HTTP Server. The manipulation as part of a HTTP Request 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:

An exploitable remote code execution vulnerability exists in the ping and tracert functionality of the TP-Link TL-R600VPN HWv3 FRNv1.3.0 and HWv2 FRNv1.2.3 http server. A specially crafted IP address can cause a stack overflow, resulting in remote code execution. An attacker can send a single authenticated HTTP request to trigger this vulnerability.

The bug was discovered 11/19/2018. The weakness was disclosed 12/01/2018 (Website). It is possible to read the advisory at talosintelligence.com. The identification of this vulnerability is CVE-2018-3950 since 01/02/2018. The exploitation is known to be easy. The attack may be initiated remotely. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 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.

The entries VDB-127368, VDB-127366 and VDB-127365 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• TP-LINK

Name

• TL-R600VPN

License

• commercial

Website

• Vendor: https://www.tp-link.com/

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CPE 2.2info

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