SB2018040905 - Authentication bypass in Vesta Control Panel
Published: April 9, 2018
Security Bulletin ID
SB2018040905
Severity
Critical
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper authentication (CVE-ID: N/A)
The vulnerability allows a remote attacker to bypass authentication checks and gain full access to the affected system.The vulnerability exists due to import validation of the authentication credentials in Vesta CP management interface. A remote unauthenticated attacker can send a specially crafted HTTP request to Vesta CP management interface, bypass authentication and gain full control over the affected server.
Note: this vulnerability is being actively exploited in the wild.
The attack was reportedly performed from IP addresses, located in China. The attackers created a file "/etc/cron.hourly/gcc.sh" on infected systems. If this file is present on your server, it means that you system has been compromised.
Remediation
Install update from vendor's website.