1C Enterprise Information Disclosure Scanner

1C Enterprise is a versatile business software platform used primarily in Russia and neighboring countries for various applications such as accounting, CRM, and ERP solutions. Its broad range of functionalities makes it popular among small to medium-sized businesses as well as large enterprises across different industries. The platform is designed to streamline business processes and improve operational efficiency. Users rely on its comprehensive solutions for managing financials, supply chain, and human resources, among other aspects. Due to its integral role in organizational operations, maintaining its security is imperative to prevent unauthorized data access. The availability of user lists on the 1C Enterprise server represents a security risk that must be monitored and mitigated.

Information Disclosure vulnerabilities arise when sensitive data is exposed to unauthorized users due to inadequate protection mechanisms. In this case, the vulnerability involves the disclosing of user lists from the 1C Enterprise server. Attackers can exploit this exposure to gather knowledge about the users operating within the enterprise system. By crawling specific URLs, details of users can be retrieved without authorization, leading to potential misuse of the information. Such vulnerabilities often exist due to misconfigurations or lack of stringent access controls. Preventative measures should focus on reinforcing authentication procedures and restricting access to sensitive endpoints.

The technical aspect of this vulnerability involves sending HTTP GET requests to the 1C Enterprise server, particularly to the "/e1cib/users" endpoint, followed by parsing the response. When successful, the response status code is 200 with content type 'text/plain' and a valid content length, along with headers containing 'vrs-rc'. The vulnerability stems from an insufficiently secured interface that responds with relevant user information to these requests. Although the server should restrict such requests, it appears to allow them, possibly due to lax security settings. Rectifying this involves server-side validation and limiting response visibility only to authenticated sessions.

If exploited, this vulnerability can lead to unauthorized access to sensitive user-related information. Malicious actors could leverage the disclosed user information to conduct targeted phishing attacks or facilitate unauthorized system access via social engineering tactics. In addition, users could become targets for further exploitation or identity theft. The dissemination of user lists without adequate checks undermines trust and can have legal ramifications if personal data protection laws are breached. Organizations must act promptly to reinforce security measures to mitigate these risks and ensure data integrity.