D-Link DIR-850L up to FW114WWb07_h2ab_beta1/FW208WWb02 /etc/stunnel.key hard-coded credentials

Summaryinfo

A vulnerability was found in D-Link DIR-850L up to FW114WWb07_h2ab_beta1/FW208WWb02. It has been classified as critical. Impacted is an unknown function of the file /etc/stunnel.key. This manipulation causes hard-coded credentials. This vulnerability appears as CVE-2017-14422. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in D-Link DIR-850L up to FW114WWb07_h2ab_beta1/FW208WWb02 (Router Operating System) and classified as critical. Affected by this vulnerability is an unknown code block of the file /etc/stunnel.key. The manipulation with an unknown input leads to a hard-coded credentials vulnerability. The CWE definition for the vulnerability is CWE-798. The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

D-Link DIR-850L REV. A (with firmware through FW114WWb07_h2ab_beta1) and REV. B (with firmware through FW208WWb02) devices use the same hardcoded /etc/stunnel.key private key across different customers' installations, which allows remote attackers to defeat the HTTPS cryptographic protection mechanisms by leveraging knowledge of this key from another installation.

The bug was discovered 09/08/2017. The weakness was presented 09/13/2017 (Website). The advisory is shared at pierrekim.github.io. This vulnerability is known as CVE-2017-14422 since 09/13/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 11/15/2019). MITRE ATT&CK project uses the attack technique T1110.001 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 5 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.

See VDB-106564, VDB-106565, VDB-106566 and VDB-106567 for similar entries. 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-850L

Version

• FW114WWb07_h2ab_beta1
• FW208WWb02

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion