Zero-day vulnerability in nBill

Directory traversal
CVE-2010-4270

Vulnerability details

Advisory: SB2010110801 - Directory traversal in nBill

Vulnerable component: nBill

CVE-ID: CVE-2010-4270

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:F/RL:O/RC:C

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Description:

The vulnerability allows a remote attacker to view contents of arbitrary files on the server.

The vulnerability exists due to insufficient filtration of user-supplied input in "/administrator/components/com_nbill/admin.nbill.php" and "/components/com_nbill/nbill.php" scripts. A remote attacker can send specially crafted HTTP request, containing directory traversal sequences (e.g. тАЬ../тАЭ) and view contents of arbitrary file on vulnerable server.

Successful exploitation of the vulnerability may allow an attacker to gain unauthorized access to potentially sensitive information.

Note: this vulnerability is being actively exploited against Joomla! installations.


External links:

http://www.nbill.co.uk/forum/index.php/topic,2158.0.html

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.