SB2009083101 - Two vulnerabilities in Microsoft IIS FTP server
Published: August 31, 2009 Updated: March 16, 2017
Security Bulletin ID
SB2009083101
Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2009-2521)
The vulnerability allows a remote authenticated attacker to cause DoS conditions on the target system.The weakness exists due to an error when processing recursive directory listing commands by the FTP Service. By sending a specially crafted LIST command containing wildcard characters, a remote attacker can trigger the FTP service to crash.
Successful exploitation of the vulnerability results in denial of service on the vulnerable system.
Note: the vulnerability was being actively exploited.
2) Stack-based buffer overflow (CVE-ID: CVE-2009-3023)
The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.The weakness exists due to stack-based buffer overflow in FTP server. A remote authenticated attacker can send a specially crafted FTP NLST command containing a wildcard that references a subdirectory, trigger memory corruption and execute arbitrary code on the system with privileges of the current user.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.
Note: the vulnerability was being actively exploited.
Remediation
Install update from vendor's website.