Plattform
other
Komponente
helloweb
Behoben in
2.0.1
CVE-2020-37034 describes an arbitrary file access vulnerability present in HelloWeb version 2.0. This flaw allows attackers to download sensitive system files by manipulating the filepath and filename parameters within HTTP GET requests. Successful exploitation could lead to the exposure of configuration data and other critical system information, potentially compromising the integrity and confidentiality of the affected system. A patch is required to remediate this vulnerability.
The primary impact of CVE-2020-37034 is the unauthorized disclosure of sensitive system files. An attacker can leverage directory traversal sequences within the download.asp endpoint to bypass access controls and retrieve files they shouldn't be able to access. This could include configuration files containing database credentials, API keys, or other sensitive data. The exposure of such information could enable further attacks, such as privilege escalation, data breaches, or complete system compromise. While the vulnerability doesn't directly lead to remote code execution, the information gained could be used to identify and exploit other weaknesses within the system.
The vulnerability was publicly disclosed on 2026-01-30. There is no indication of active exploitation or inclusion in the CISA KEV catalog at this time. Public proof-of-concept exploits are not widely known, but the vulnerability's nature and ease of exploitation suggest a potential for future exploitation attempts. The vulnerability's reliance on directory traversal makes it similar to other file access vulnerabilities, and attackers may leverage similar techniques.
Systems running HelloWeb version 2.0 are directly at risk. Shared hosting environments where multiple users share the same web server instance are particularly vulnerable, as an attacker exploiting this vulnerability on one user's account could potentially access files belonging to other users on the same server.
• generic web: Use curl to test the download.asp endpoint with directory traversal sequences (e.g., curl 'download.asp?filepath=../../../../etc/passwd&filename=passwd').
• generic web: Examine access logs for requests to download.asp containing ../ or other directory traversal sequences in the filepath or filename parameters.
• generic web: Check response headers for unexpected content types or file extensions when accessing download.asp with crafted parameters.
disclosure
Exploit-Status
EPSS
0.21% (43% Perzentil)
CISA SSVC
CVSS-Vektor
The recommended mitigation for CVE-2020-37034 is to upgrade to a patched version of HelloWeb. Since a fixed version is not specified in the provided data, consider implementing temporary workarounds until a patch is available. These may include restricting access to the download.asp endpoint through a Web Application Firewall (WAF) or proxy server, implementing strict input validation on the filepath and filename parameters, and disabling directory listing. Monitor access logs for suspicious activity involving the download.asp endpoint. After implementing mitigations, verify their effectiveness by attempting to access sensitive files via the vulnerable endpoint.
Actualizar a una versión parcheada o descontinuar el uso de HelloWeb 2.0. Como medida temporal, se puede implementar una validación exhaustiva de las entradas de usuario en los parámetros filepath y filename para prevenir el acceso a archivos no autorizados.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2020-37034 is a vulnerability in HelloWeb 2.0 allowing attackers to download system files by manipulating parameters. It has a CVSS score of 7.5 (HIGH).
If you are running HelloWeb version 2.0, you are potentially affected. Upgrade to a patched version as soon as possible.
Upgrade HelloWeb to the latest available version. Implement input validation on the filepath and filename parameters as a temporary workaround.
There is no confirmed active exploitation currently, but the vulnerability's simplicity makes it a potential target.
Refer to the vendor's website or security advisories for the latest information and updates regarding CVE-2020-37034.
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.