A vulnerability, which was classified as critical, has been found in EFS Easy Chat Server up to 3.1 (Chat Software). Affected by this issue is an unknown function of the file registresult.htm. The manipulation with an unknown input leads to a credentials management vulnerability. Using CWE to declare the problem leads to CWE-255. Impacted is confidentiality, integrity, and availability. CVE summarizes:

register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1 allows remote attackers to reset arbitrary passwords via a crafted POST request to registresult.htm.

The bug was discovered 06/09/2017. The weakness was disclosed 06/12/2017 as EDB-ID 42154 as not defined exploit (Exploit-DB). The advisory is available at exploit-db.com. This vulnerability is handled as CVE-2017-9543 since 06/11/2017. The exploitation is known to be easy. 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 T1552 by the MITRE ATT&CK project.

After immediately, there has been an exploit disclosed. 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 3 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:registresult.htm it is possible to find vulnerable targets with Google Hacking.

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 (42154). The entry 102243 is pretty similar.

Productinfo

Type

• Chat Software

Vendor

• EFS

Name

• Easy Chat Server

Version

• 3.0
• 3.1

CPE 2.3info

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• 🔍
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CPE 2.2info

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