eQ Homematic CCU2 up to 2.29.2 Web Interface User.setLanguage path traversal

Summaryinfo

A vulnerability was found in eQ Homematic CCU2 up to 2.29.2. It has been declared as critical. The impacted element is the function User.setLanguage of the component Web Interface. Such manipulation leads to path traversal. This vulnerability is traded as CVE-2018-7300. The attack may be launched remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in eQ Homematic CCU2 up to 2.29.2. It has been rated as critical. Affected by this issue is the function User.setLanguage of the component Web Interface. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Directory Traversal / Arbitrary File Write / Remote Code Execution in the User.setLanguage method in eQ-3 AG Homematic CCU2 2.29.2 and earlier allows remote attackers to write arbitrary files to the device's filesystem. This vulnerability can be exploited by unauthenticated attackers with access to the web interface.

The bug was discovered 02/21/2018. The weakness was shared 02/22/2018 (Website). The advisory is available at atomic111.github.io. This vulnerability is handled as CVE-2018-7300 since 02/21/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. 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 $0-$5k.

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 Exploit-DB (44361). The entries VDB-113715, VDB-113713, VDB-113712 and VDB-113710 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• eQ

Name

• Homematic CCU2

Version

• 2.29.0
• 2.29.1
• 2.29.2

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion